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child psychology
| Question | Answer |
|---|---|
| What is a gene? | segment of DNA that contains instructions for making proteins. |
| DNA duplicates itself through the process of | mitosis |
| heredity supplies our | genotype |
| what reflects the combined effects of heredity and environment? | phenotypes |
| What structures in the nucleus of each cell, store and transmit genetic information? | chromosomes |
| chromosomes are made up of molecules of | DNA |
| individuals are created when what combines? | gametes |
| what is formed through a cell division process? | meiosis |
| what is one of the most frequently occurring recessive disorders? | phenylketonuria |
| what is x-linked inheritance? | harmful allele is carried on the x chromosome. |
| prenatal development takes place in three phases. | the period of the zygote, the period of the embryo, & the period of the fetus. |
| how long can sperm live? | up to six days |
| what | |
| how long does the period of the zygote last? | about two weeks |
| by the fourth day, 60 to 70 cells exists, forming a hollow, fluid filled ball called | blastocyst |
| where is embryonic disk located? | cells on the inside of the blastocyst. |
| where is trophoblast located? | outer rings of cells |
| when does implantation? | between the seventh and ninth days, when the blastocyst burrows into the uterine lining |
| what does yolk sac produce? | blood cells until the liver, spleen, and bone marrow are mature enough to do so. |
| what does trophoblast do? | become the structures that provide protective covering and nourishment. |
| how long does the period of the fetus lasts? | from the ninth week to the end pregnancy. |
| organs, muscles, and nervous began to become organized and connected during which period? | the period of the fetus. |
| external genitals are well-formed during which week? | the twelfth week |
| high birth weight is linked to what? | breast cancer |
| what is linked to increased risk of premature delivery and birth complications? | antidepressants |
| studies show that low birth weight is associated with | high blood pressure, stroke, heart disease, and diabetes in middle adulthood. |
| what fine hair covers the fetus? | Lanugo |
| What cheeselike substance covers the skin of the fetus, protecting it from chapping? | Vernix |
| how long is the age of viability? | between 22 and 26 weeks |
| what does age of viability mean? | point at which the baby can first survive if born early. |
| what enlarges and the fetus spends more time awake? | cerebral cortex |
Created by:
brittney280
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