PSYC 351 Chapter Notes - Chapter 3: Hypotonia, Chromosome Abnormality, Human Genome Project
10 Dec 2013
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Chapter 3: mechanism of inheritance, cell division, in humans, each cell nucleus contains 23 pairs of chromosomes, 22 pairs of autosomes, two types of specialized cells: body cells, germ cells. When the errors turn out to be adaptive, they result in improvements in the species. 90% of all genetic abnormalities result in miscarriage rather than live births. Then, at about 8 months of age, they usually become extremely listless, blind, die by. No treatment, but carrier screening program dramatically reduced the incidence: pku- body fails to produce an enzyme that breaks down phenylalanine. Thus, abnormal amounts of the substance accumulate in the blood and harm the developing brain cells. Usually, the pregnancy gets terminated before mother even knows about conception. However, those that survive the baby is female in appearance, but the ovaries quickly begin to disappear and do not produce the hormones necessary for the sex differentiation process to continue.
