PSY 302 Chapter Notes - Chapter 2: Prenatal Development, Zygote, Fetus
10 Sep 2015
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Chapter 2: prenatal development & the newborn period: prenatal development: 7 parts: Results from the union of two gametes [(germ) sex cells]: egg and sperm. 46 chromosomes (23 from both sexes) make up human dna. Male embryos are miscarried at higher rates than females; boys are more vulnerable: approx. 120-150 males are conceived for every 100 females to developmental disorders and illness throughout life span: female reproductive system: (1) cell division results in rapid increase of cells. (2) cell migration is the movement of cells from their point of origin to. (3) cell differentiation (stem cells) are equivalent/interhcangeable: somewhere else in the embryo no fixed fate/function; starts to specialize in structure/function after several cell divisions: the role of hormones: (4) apoptosis enables prenatal development; genetically programmed cell death. All human fetuses can develop either male/female genitalia depending on the. One of the many ways in which the fetus acts as an instigator of its own development.
