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anatomy final

units 1 - 4

Target cells for releasing hormones are in the anterior pituitary gland.
Which of the following might serve as a secondary pacemaker for the heart? AV node
The skeleton of the heart consists of fibrous connective tissue encircling the atrioventricular orifices.
Universal precautions are specific measures that health-care workers should take to prevent transmission of bloodborne pathogens in the workplace.
Angiotensin II increases blood pressure by increasing peripheral resistance.
Exocrine glands differ from endocrine glands in that exocrine glands secrete through ducts or tubes to the body's exterior.
Marianne has small, bruise-like spots on her skin and a low platelet count. These blemishes are most likely petechiae.
What is the difference between serum and plasma? Plasma contains fibrinogen; serum does not.
Heme released from hemoglobin in aged red blood cells is decomposed in the liver into iron and the bile pigment biliverdin, which is eventually converted to bilirubin.
When the ventricular walls contract, the mitral and tricuspid valves close.
transcontinental flight a middle-aged man gets up and exercises in the aisle, moving his hands, feet, arms, & legs as much as he can. every 2 hrs flight attendant asks him to sit he explains that he is trying to prevent a dangerous medical condition. deep vein thrombosis
Plasma proteins in capillaries help to maintain the osmotic pressure of the blood.
A person warming up after being cold feels a warm rush as blood flows quickly to the peripheral appendages. Nitric oxide is important in this situation because it relaxes the smooth muscle in the blood vessel wall.
Listening with a stethoscope just to the right near the tip of the sternum, sounds come most distinctly from the tricuspid valve.
Oxytocin is administered to women following childbirth to stimulate uterine contractions.
Secretion of insulin causes a decrease in the concentration of blood glucose.
As a result of the general stress response, blood concentrations of epinephrine and cortisol rise.
Which of the following helps return blood to the heart? Contracting skeletal muscles
__________ controls hormone concentrations. Negative feedback
Jerry drinks a few beers and soon has to urinate. The alcohol has inhibited secretion of ADH.
Which of the following is due to an aging cardiovascular system? The tunica interna thickens.
Heparin prevents blood clotting by inhibiting the formation of prothrombin activator and the action of thrombin on fibrinogen.
Irving, who is 78 years old, takes human growth hormone supplements to regain the strength of his youth. He may be disappointed, because the hormone has been shown only to decrease fat and increase muscle mass, but not improve strength.
The correct sequence of parts that carry cardiac impulses is SA node, AV node, AV bundle, Purkinje fibers
Biliverdin and bilirubin are pigments that result from the breakdown of red blood cells. Biliverdin is ______ in color and bilirubin is ______ in color. greenish; orange
Compared to the nervous system, the endocrine system may have a longer lasting effect.
Petechiae are a symptom of thrombocytopenia.
The release of tissue thromboplastin initiates the extrinsic clotting mechanism.
Which of the following waves of an ECG pattern is/are correctly described? P wave-depolarization of atria
Aldosterone promotes the homeostasis of ions by causing the kidneys to conserve sodium and excrete potassium.
Athletes abuse erythropoeitin (EPO) because it increases the red blood cell supply, which brings more oxygen to muscle cells.
Tim runs 5 to 8 miles a day. He has an enlarged heart and low heart rate and blood pressure. He most likely has a very healthy cardiovascular system.
A pulmonary embolism is most likely caused by a clot reaching a lung through a pulmonary artery.
Which of the following correctly matches the valve to its function? Mitral valve-permits one-way blood flow from the left atrium to the left ventricle
Blood flow to the right side of the heart muscle decreases due to constriction of the _____, and decreased blood flow to the heart tissue can result in _____. right coronary artery; ischemia
Bruce has colorectal cancer that has spread to his lymphatic system. He is given a drug that is an angiogenesis inhibitor. The drug works by starving tumors by cutting off their blood supplies.
Which of the following usually accounts for the smallest percentage of leukocytes in a blood sample? Basophils
Maxwell has a very high metabolic rate, is skinny, and has protruding eyes. These are symptoms of hyperthyroidism.
A steroid hormone acts on a target cell by directly causing protein synthesis.
A hormone is a ______ and the target cell is __________. molecule that has a metabolic effect on another cell; a cell that has receptors for specific hormones
Diabetes mellitus results in urine with high osmotic pressure.
Thyroxine enhances the rate at which proteins are synthesized.
Platelets are best described as cytoplasmic fragments of cells.
Cortisol stimulates the production of glucose from noncarbohydrates.
The secretion of parathyroid hormone is controlled primarily by the concentration of blood calcium.
Which of the following is the correct sequence of parts through which blood moves from the vena cava to the lungs? Right ventricle, tricuspid valve, right atrium, pulmonary valve
In an ECG pattern, the PQ interval indicates how long it takes for the cardiac impulse to travel from the SA node through the AV node.
The proteins that B cells produce that attack foreign molecules are antibodies.
The specificity of hormone action derives from target cell receptors that are unique for each hormone.
The blood pressure in the large systemic arteries is greatest during ventricular systole.
Which of the following is an agranulocyte? A monocyte
A blood clot that forms abnormally in a blood vessel is a(n) thrombus
A primary function of lymphocytes is to act against foreign substances.
Pus is composed of bacteria, white blood cells, and damaged cells.
Water and dissolved substances leave the arteriole end of a capillary due to ____, and enter the venule end of a capillary due to ______. hydrostatic pressure being higher than osmotic pressure; osmotic pressure being higher than hydrostatic pressure
Secretion of glucagon causes an increase in the concentration of blood glucose.
Which of the following is most life threatening? Ventricular fibrillation
Stacy has been tired and bruising easily, and she's had three respiratory infections in the past few months. She has also had headaches and a few nosebleeds. A physician should check her for leukemia.
The basic event in the formation of a blood clot is the change of fibrinogen to fibrin.
Cyanosis is caused by an increased blood concentration of deoxyhemoglobin.
The red blood cells of type AB blood have on their surfaces antigens A and B.
A hormone with an effect that lasts for days would have a long half-life.
Which of the following hormones primarily affects the reproductive organs? Follicle-stimulating hormone
Marjorie suffers from phlebitis. She has inflammation of her veins.
Interferon is a group of hormonelike peptides that cells produce in response to viruses
Cells of the ______ system require a continuous supply of glucose. nervous
A large calorie (kilocalorie) equals the amount of heat required to raise the temperature of a kilogram of water by ___ degree Celsius. 1
________ provides short-term energy after cellular glucose supplies are depleted. glycogen
_________ initiate(s) a cascade effect in response to foreign proteins in the body. the complement system
Excess potassium is excreted in urine.
Which of the following minerals is important in synthesizing and using ATP? Magnesium
Salivary amylase digests carbohydrates
The epithelial cells that form the inner lining of the small intestine are replaced every few days.
The uvula is a projection from the soft palate.
The hormone secretin stimulates release of pancreatic juice.
Excess calcium in the diet causes deposition of calcium in soft tissue.
The vitamin that functions as part of coenzyme A is pantothenic acid.
The functions of saliva include moistening, binding and dissolving food particles; beginning chemical digestion of carbohydrates; and cleansing the teeth and mouth.
It is good that Emily does not remember being a newborn, because she was miserable, vomiting frequently. An X-ray revealed hypertrophic pyloric stenosis. The problem in Emily's digestive system, before surgery helped her, was overgrowth of muscle that blocked the passageway from the stomach to the small intestine.
Sarah eats only dairy, and no meat or eggs. She is a(n) lacto-vegetarian.
Deficiency of vitamin ___ causes osteomalacia. D
Newborns can acquire __________ immunity through breast milk. passive
A triglyceride consists of glycerol and three fatty acids.
The alimentary canal extends, in its entirety, from the mouth to the anus.
Which of the following is true about bile? Bile is produced by the liver.
Which of the following terms is (are) defined correctly? Adequate diet-diet that provides sufficient energy and essential nutrients for growth, maintenance, and repair of tissues Malnutrition-poor nutrition that results from a lack of essential nutrients Bulimia-binging and purging
Enlarged blood vessels of the anal columns are called hemorrhoids.
The supratrochlear lymph nodes are located near the elbow
In the cellular immune response T cells attach directly to antigens and destroy them.
The main part of the stomach is called the body
Heartburn is usually caused by the effects of gastric juice on the esophagus
After lymph leaves the collecting ducts, it enters _____ and becomes part of the ______. veins; plasma
Heart valve cells can be damaged through autoimmunity.
The _______ is the part of the digestive tract that has the most lymph nodules and bacteria. ileum
Stephanie has her cancerous right breast removed, and the surgeon also removes lymph nodes in the axillary region, to prevent spread of the cancer. As a result, Stephanie's right arm becomes edematous.
The fat-soluble vitamins include vitamins A, D, and K.
The condition associated with lack of intrinsic factor and decreased absorption of cyanobalamin is pernicious anemia.
Henry has a cut on his thigh that becomes infected. The lymph nodes in his __________ enlarge. inguinal region
The cells that are primarily responsible for immunity are lymphocytes and macrophages.
Which of the following is not a monosaccharide? sucrose
Foreign particles that are injected into the skin enter the lymphatic system rapidly
The parotid glands are the largest salivary glands.
A virus differs from other pathogens in that it is not capable of reproduction outside a living cell.
A negative nitrogen balance results from a net loss of amino acids.
The tissues turning yellow (jaundice) is due to the accumulation of bile pigments.
The region of a lymph node through which blood vessels and nerves pass is called the hilum
The anti-Rh factor is an example of an igG
Changes in the mouth associated with aging include thinning enamel.
Cells in a lymph node that engulf and destroy damaged cells, foreign substances, and cellular debris are macrophages
Disease-causing agents are called pathogens
Which trace element and function is correctly matched? Iron-part of hemoglobin molecule
Bacteria cause dental caries by metabolizing carbohydrates in food, producing acidic by-products that damage enamel and dentin.
BMR rises from birth to age five, then declines, then peaks in adolescence, then drops during adulthood. `
Over-the-counter antacids usually include sodium, aluminum, calcium, or magnesium.
Factors that affect BMR are body size. body temperature. the level of endocrine activity.
Which of the following is not a mechanical barrier against microorganisms? Diarrhea
Activities of the digestive system generally increase when it is stimulated by parasympathetic impulses.
Which of the following is part of the adaptive immune response? Production of antibodies
Gastrin, which stomach cells secrete, increases secretion by the gastric glands.
During the defecation reflex, the diaphragm is lowered.
Vanessa takes many vitamin supplements, claiming that they give her energy. She is mistaken, because cells preferentially use _______ for energy. carbohydrates
The two collecting ducts that drain the lymphatic trunks are the thoracic duct and right lymphatic duct.
A major step in extracting energy from proteins is deamination
Which of the following vitamins is necessary for producing collagen? Vitamin C
The functions of the lymphatic system do not include transporting hormones to intestinal smooth muscle.
The correct sequence for the layers in the walls of the alimentary canal from innermost to outermost is the mucosa, submucosa, muscular layer, serosa.
A sudden inspiration caused by a spasmodic contraction of the diaphragm while the glottis is closed is a hiccup
The trachea is all of the above.
an 8-year-old with cystic fibrosis. 30 min each morn & eve holds her body in various positions & massages the lungs to dislodge sticky mucus Arielle spits into a jar. She takes meds an enzyme - that thins the mucus. If she didn't take these measures? infection
A flashlight placed just below the eyebrow in a darkened room illuminates the frontal sinus
The organs of the upper respiratory tract are located outside the thorax. true
Of the respiratory air volumes listed, which one has the largest volume? vital capacity
A sudden contraction of the diaphragm while the glottis is closed produces a sneeze. false
Which of these laryngeal cartilages is single? Cricoid
The right lung has ______ lobes; the left lung has ______ lobes. superior, middle, and inferior; superior and inferior
Which of the following is not a function of the mucus-covered nasal passages? Cooling exhaled air
The events of respiration are ventilation, external and internal respiration, and cellular respiration.
The visceral and parietal pleural membranes are normally held together by a thin film of serous fluid.
The procedure used to directly examine the trachea and bronchial tree is called bronchoscopy
Another word for breathing is ventilation. true
The volume of air that enters (or leaves) during a single respiratory cycle is the tidal volume.
The first event in expiration is the diaphragm and external intercostal respiratory muscles relax.
The inflation reflex is activated when stretch receptors are stimulated during inspiration. true
The left lung is larger than the right lung and is divided into three lobes. false
Which of the following bones does not house a sinus? Zygomatic
The force responsible for normal expiration is supplied by the elastic recoil of tissues and surface tension.
Oxygen plays a minor role in control of normal respiration because deoxygenated venous blood is 75% saturated.
Oxygen is carried in the blood in the form of bicarbonate ions and is bound to hemoglobin. false
Alveoli are kept clean by the action of macrophages.
Which of the following proteins transports some carbon dioxide in the blood? Hemoglobin
Changes in the respiratory system that accompany aging are all of the above
Hyperventilation is usually accompanied by a(n) decrease in blood CO2 concentration and a rise in pH.
The chemoreceptors in the carotid and aortic bodies are most sensitive to changes in blood concentration of oxygen.
Police stop Richard for driving erratically at 3 AM and give him a breathalyzer test, which he fails miserably because of the thinness of his respiratory membranes.
Gas exchange occurs across alveolar pores. false
The walls of the alveoli are composed of simple squamous epithelium.
The enzyme carbonic anhydrase causes carbon dioxide to react with water.
Coughing reflexes become faster with age. false
The chloride shift maintains the ionic balance between the red blood cells and the plasma.
The partial pressure of oxygen that stimulates the respiratory areas is ___ of normal. 50%
The greatest amount of carbon dioxide transported in the blood is in the form of dissolved carbon dioxide. false
Which of the following factors does not directly affect breathing rate? pH
Carbon monoxide bonds to hemoglobin more effectively than does oxygen. true
"I'm going to hold my breath until I turn blue and stop breathing and die and it will be all your fault!" shrieked the 6-year-old at her father. The child was unable to carry out her threat because increased CO2 and hydrogen ion concentration and decreased oxygen concentration stimulate chemoreceptors.
Increasing blood concentrations of carbon dioxide and hydrogen ions have similar effects upon the respiratory areas due to an increase in carbon dioxide, increasing hydrogen ions.
The ventral part of the medulla oblongata near the origin of the vagus nerve has central chemoreceptors
At rest, the kidneys receive about a quarter of the blood coming from the heart. true
The renal medulla is composed of _____, whereas the renal cortex is composed of _____. renal pyramids; renal corpuscles
Which of the following is not a function of the kidneys? Synthesis of plasma proteins
Podocytes and pedicels are part of the glomerular capsule.
A renal corpuscle includes the glomerulus and glomerular capsule.
The efferent arteriole supplies blood to the capillary of the glomerulus. false
Once in the glomerular capsule, the filtrate moves into the renal tubule
A nephron consists of a renal corpuscle and a renal tubule.
As a consequence of widespread edema associated with nephrotic syndrome, blood volume decreases and blood pressure drops.
Athletes might abuse which of the following chemicals made in the urinary system to improve performance by increasing red blood cell production? Erythropoietin (EPO)
The detrusor muscle is in the urinary bladder.
ADH increases reabsorption of water from urine into blood by increasing the permeability of the distal convoluted tubules and collecting ducts. true
remove a particular substance from the blood.
Females are at higher risk of contracting a urinary tract infection because the female urethra is shorter than the male's.
Inulin and para-aminohippuric acid (PAH) can be used to determine glomerular filtration rate and the rate of blood flow through the kidneys, respectively. true
Marvin goes on vacation to Maine and for a week eats nothing but seafood. The next week, he experiences intense pain in his big toe. He probably has gout
Many hydrogen ions are secreted between the plasma in the peritubular capillaries and the filtrate in the nephron loop. false
The layers of a ureter are outer fibrous coat, middle muscular coat, inner mucous coat.
When sodium ions are reabsorbed through the wall of the renal tubule by active transport, chloride ions are reabsorbed by passive transport.
Which of the following correctly lists the order of structures through which urine flows after its formation in the nephron? calyx, renal pelvis, ureter, urinary bladder, urethra
Which of the following is not part of the male urethra? Ductus deferens
A decrease in the glomerular capsule hydrostatic pressure will _____ the rate of glomerular filtration. increase
A by-product of amino acid catabolism in the liver is urea
Glomerular filtrate is similar to tissue fluid in composition. true
Nocturnal enuresis is bedwetting
Up to ______ of urea is filtered and recycled. 80%
Filtration rate in the glomerulus is increased by both vasodilation of the afferent arteriole and vasoconstriction of the efferent arteriole.
Kidney cells die as early as age 20
The hormone ADH promotes water reabsorption through the wall(s) of the distal convoluted tubule and collecting duct.
Which of the following does not occur with aging of the urinary system? nephrons invert.
If glucose is not reabsorbed in the tubular fluid ___________ increases. the osmotic pressure
Kidney shrinkage with age is due to loss of glomeruli.
Aldosterone from the adrenal cortex causes sodium ions to be conserved and potassium ions to be excreted.
The ureter extends downward behind the parietal peritoneum and joins the urinary bladder from below.
Autoregulation refers to maintaining constant GFR.
Glomerular filtration produces about ________ liters of fluid in twenty-four hours. 180
Which of the following is a normal constituent of urine? All of the above
Glomerular filtration produces about 18 liters of fluid formed in twenty-four hours. false
Peristaltic waves force urine along the length of the ureter. true
Barbara has the disease gout. The inflammation and pain in her joints is due to excess _____________ in her plasma, which leads to crystal deposits in her great toe joint. uric acid
An important stimulus for the secretion of aldosterone is rising potassium ion concentration.
Marielle is very thirsty following her tennis game. She drinks for a few minutes, then stops. The stimulus to stop drinking comes from distension of her stomach.
In a healthy body, the volume of water remains relatively stable at all times. true
Which of the following would be most helpful in treating hypocalcemia? Administering high doses of vitamin D and calcium salts
The thirst center is located in the hypothalamus.
Which of the following body compartments is correctly matched with its location in the body? extracellular-fluid in tissue spaces, blood vessels, and lymphatic vessels
Thirst is triggered when total body water decreases by as little as 1%
Parathyroid hormone increases phosphate reabsorption from the renal tubules. false
Compared to the average adult male, the average adult female has less water and more adipose tissue.
The ratio of intracellular to extracellular fluids in the body of an average male is 2:1
Intracellular fluids have high concentrations of potassium and phosphate ions.
The thirst center in the hypothalamus is stimulated by _____ of the extracellular fluid, and is inhibited by _____. an increase in the osmotic pressure; distension of the stomach by water
The greatest output of electrolytes normally is in urine. true
The hormone ADH is released from the anterior lobe of the pituitary gland. false
A person in a moderate environment would lose the greatest volume of water in urine
A person usually drinks about ____ milliliters a day. 1500
The hormone aldosterone promotes the reabsorption of sodium ions.
If excess water enters the body, osmoreceptors in the brain swell.
Which of the following most closely represents the percentage of water by weight in an adult male? 65%
Factors that alter water balance will also alter electrolyte balance. true
Respiratory alkalosis can be compensated for by a decreased respiratory rate.
compensated for by a decreased respiratory rate. amino and carboxyl groups.
Acidosis is a pH of arterial blood below 7.35
Kidneys help to regulate acid-base balance of the blood by secreting OH-. false
A protein functions as an acid-base buffer system by the -COOH group of a molecule accepting H+ in the presence of excess acid and the NH3 group of a molecule releasing H+ in the presence of excess base. true
Sometimes the carboxyl groups of proteins release hydrogen ions. true
Prolonged vomiting, in which only the stomach contents are lost, leads to metabolic alkalosis
Which of the following metabolic processes releases hydrogen ions to body fluids? All of the above
Metabolic alkalosis may be caused by all of the above.
The buffer system in blood is formed by hemoglobin binding hydrogen ions in red blood cells.
Maxwell has just finished a brutal 10 kilometer run. His body has an increased production of carbonic acid and decreased pH of body fluids.
Metabolic acidosis can be compensated for by an increased breathing rate and depth.
Ingestion of too much sodium bicarbonate to relieve indigestion may lead to metabolic alkalosis.
Acid-base buffers are the first line of defense against shifts in pH because they are fast
Meiosis is necessary because otherwise the fertilized ovum will have too much genetic material.
Synapsis occurs during prophase I.
The gubernaculum guides the testis through the ________ canal. inguinal
The number of sperm cells in an ejaculate averages about 120 million per milliliter.
The average length of the epididymis is 6 meters.
Sperm cells mature in the epididymides.
Undifferentiated spermatogenic cells are called spermatogonia.
Which of the following correctly describes an erection? Parasympathetic neurons release nitric oxide causing dilation of small arteries in the penis.
The prostate gland is the size and shape of a walnut or chestnut.
The hormone responsible for the development and maintenance of male secondary sex characteristics is testosterone.
Male secondary sex characterisitics include all of the above.
The level of testosterone in the blood is increased by LH causing the interstitial cells to release testosterone.
The tubular part of the uterus that extends downward into the upper vagina is the cervix
The zona pellucida consists of glycoprotein
Which of the following terms is/are correctly defined? All of the above
The female structure that corresponds to the male penis is the clitoris
The hormone mainly responsible for the development and maintenance of female secondary sexual characteristics is estrogen
Signs of menopause include shrinking of the vagina, uterus, and breasts.
In the reproductive cycle, estrogen _____, whereas progesterone _____. stimulates uterine wall development; stimulates the uterine lining to become more glandular
A woman going through menopause may take ______ to minimize the symptoms. hormone replacement therapy
The glands in a lobe of a breast drain into alveolar ducts, which drain into a lactiferous duct that leads to the nipple.
The most commonly used oral contraceptives contain synthetic estrogen and progesterone.
Which of the following is (are) forms of contraception? All of the above
Oral contraceptives may cause all of the above.
Human prenatal development takes ___ weeks. 38
Fertilization usually occurs in the uterine tube.
An enzyme that sperm secretes that is important for egg penetration is hyaluronidase
Embryonic stem cells are derived from the inner cell mass of the blastocyst.
Compared to adult hemoglobin, fetal hemoglobin binds oxygen more readily.
The fetus is protected from certain infections, to which the mother is immune, by antibodies from the mother's immune system.
The hormone measured in a pregnancy test is hCG.
The ductus venosus is a fetal vessel that transports blood from the umbilical vein to the inferior vena cava.
As a result of the foramen ovale, blood is allowed to bypass the lungs
The placenta is composed of tissues from the mother and embryo.
The external genitalia of the fetus can be distinguished as male or female by about ___ weeks after fertilization. 12
A blastomere is a _____ and a blastocyst is _____. cell produced by cleavage; a hollow ball of cells
The major body part(s) derived from ectoderm is/are nervous system and skin.
The placenta allows oxygen and nutrients to diffuse from maternal blood to the embryo.
Amniotic fluid protects the embryo against being jarred by movements.
The term newborn refers to the period from birth through _____, whereas the term infant refers to the period from _____. the first four weeks; the first month to 1 year
Following birth, the infant's metabolic rate increases and its oxygen consumption increases.
After birth, the foramen ovale is closed as a result of increasing pressure in the left atrium.
Fetal hemoglobin becomes largely replaced with adult hemoglobin from 4 months after birth.
Which of the following is not a characteristic of childhood? Becoming reproductively functional
The period of preactive dying takes up to three months.
Passive aging is a breakdown of structures and slowing of functions.
Human life span is ___ years. 120
The two types of information needed to predict the inheritance pattern of a trait are the way genes are distributed in meiosis and the way that they come together when sperm joins egg.
A karyotype is a size-ordered chart of chromosomes.
Identical alleles are said to be homozygous
The genotypes and phenotypes that result from a cross of AA and Aa (A = normal pigmentation and a = albinism) are phenotypes-all normal; genotypes-50% homozygous dominant and 50% heterozygous.
phenotypes-all normal; genotypes-50% homozygous dominant and 50% heterozygous. phenotypes-75% normal and 25% albino; genotypes-25% homozygous dominant and 50% heterozygous and 25% homozygous recessive.
An individual who is homozygous dominant for a trait can be symbolized AA
An offspring of parents whose genotypes are Aa and Aa may be AA, Aa, or aa.
In incomplete dominance, the heterozygous phenotype is intermediate between that of either homozygote.
von Willebrand disease, is either autosomal recessive or autosomal dominant, clotting time slows & the person bruises & bleeds easily. Not every1 who inherits the disease geneotype develops the phenotype. individuals hv differing degree in clotting blood incompletely penetrant, variably expressive, and genetically heterogeneic.
The nuances of eye color arise from the way pigments are deposited in the iris.
A bell curve is characteristic of the distribution of phenotypes of a multifactorial trait because the phenotypes at the ends of the curve correspond to fewer genotypes than the phenotypes at the middle of the distribution.
The approximate number of protein-encoding genes on the Y chromosome is 231.
Antonio is colorblind. His partner Emilia is not colorblind nor is she a carrier (heterozygote) for colorblindness. The offspring of this couple would all have normal color vision.
In genomic imprinting the same allele has a different effect if inherited from the mother or father.
The chemical group that binds to DNA causing genomic imprinting is methyl.
Cells from a woman with Turner syndrome have only one X chromosome.
A human cell with 46 chromosomes is euploid.
A human cell that has 69 chromosomes is triploid
If a Y-bearing sperm fertilizes an XX egg, the resulting individual would be a male with XXY syndrome.
Ultrasound and maternal serum marker tests are less informative than amniocentesis or chorionic villus sampling (CVS) in diagnosing trisomy 21 because ultrasound and maternal serum markers do not check chromosomes and CVS and amniocentesis do.
Which of the following prenatal tests is non-invasive? Ultrasound
Gene expression profiling detects the mRNAs present in a particular cell type under particular conditions.
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