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Psych 210

Chapter 2

QuestionAnswer
genotype the complete set of genes that makes up a person's heredity
phenotype genetic instructions along with environmental influences
pku recessive disease babies lack liver enzyme which converts phenyalaline...poison..mental retardation
huntingtons disease dominant disease carried on chromosome 4
down syndrome have an extra 21st chromosome cuased by the egg
klinefelter's syndrome XXY tall, small testicles, sterile, below normal intellgience
XXY Complement xyy Tall with below normal intelligence
TURNER'S SYNDROME x limited sex development, problems perceiving spacial relations
xxx syndrome motor and language development problems
polygenic inheritance phenotypes reflect the combined activity of many genes
reaction range when the same genotype produces a range of phenotypes depending on the environment
niche picking seeking environments based on heredity
nonshared environmental influences forces within a family that make children different
Zygote Weeks 1-2 fertilized egg,
germ disc small cluster of cells near center of zygote becomes the baby
amnion sac the embryo rests in
amniotic fluid cushions embryo and maintains temp
umbilical cord houses blood vessels that join embryo and placenta
ectoderm hair outer layer
mesoderm middle forms muscles bones and circulatory system
endoderm inner forms digestive sytem and lungs
cephalocaudal principle head to spine
proximodistal principle inner to outer
month 5-6 eyebrows eyelashes and hair, vernix
vernix greasy substance protects fetus in amniotic fluid
month three males develop testes and females ovaries third month testes tell cells to be penis in female the hormone is absent making a vagina
age of viability weeks 22-28 a baby has a chance at survival
spina bifida when a mother does not consume enought folic acid the embryos neural tube does not close properly
thalidomide babies born with deformed limbs
fetal alcohol syndrome thin upper lip short nose widly spaced eyes mental retardation and slow growth
amniocentis needle through stomach is inserted into amniotic fluid, takes 3 weeks for results
chorionic villi testing tissue obtained from placenta through the vagina, done at 8-9 weeks quick results
hypoxia pinched umbilical cord-baby does not receive enough oxygen
hypoxia pinched umbilical cord-baby does not receive enough oxygen
low bith weight weighs less than 2500 grams, 5.5 pounds
very low bith weight weighs less than 1500 grams or 3.3 pounds
low bith weight weighs less than 2500 grams, 5.5 pounds
extremely low birth weight less than 1000 grams or 2.2 pounds
extremely low birth weight less than 1000 grams or 2.2 pounds
very low birth weight less than 1500 grams 3.3 pounds
extremely low birth weight less than 1000 grams or 2.2 pounds
Created by: luvbug2707