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Chapter 2 Vocab Review

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