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Chapter 2 Vocab Review

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Across
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Process of deliberately seeking environments that are compatible with one's genetic makeup
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Person's hereditary makeup
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The result of two separate eggs fertilized by two sperm; same as fraternal twins
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Outer layer of the embryo, which becomes the hair, outer layer of skin, and nervous system
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Inner layer of the embryo, which becomes the lungs and digestive system
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A principle of physical growth that states that structures nearest the head develop first
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Inner sac in which the developing child rests
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Structure through which nutrients and wastes are exchanged between the mother and the developing child
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Prenatal diagnostic technique that uses a syringe to withdraw a sample of amniotic fluid through the mother's abdomen
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Substance that protects the fetus's skin during development
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Fertilized egg
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Prenatal diagnostic technique that uses sound waves to generate an image of the fetus
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Effort to improve the human species by letting only people whose characteristics are valued by a society mate and pass along their genes
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Disorder in which the embryo's neutral tube does not close properly
Down
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principle of physical growth that states that structures nearest the center of the body develop first
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The result of a single fertilized egg splitting to form two new individuals; same as identical twins
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Inherited disorder in which the infant lacks a liver enzyme
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An agent that causes abnormal prenatal development
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Term given to the zygote once it is completely embedded in the uterine wall
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Wrinkled surface of the brain that regulates many functions that are distinctly human
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A birth complication in which umbilical blood flow is disrupted and the infant does not receive adequate oxygen
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Middle layer of the embryo, which becomes the muscles, bones, and circulatory system
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Threadlike structures in the nuclei of cells that contain genetic material
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First 22 pairs of chromosomes
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Group of nucleotide bases that provides a specific set of biochemical instructions