PSY 324 Chapter : Week 8 - Neuroendocrine Systems
13 Dec 2011
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Document Summary
Sexually dimorphic behaviors are behaviors that differ in males and females. Hormones that are present before and after birth play a special role in the development and control of sexually dimorphic behaviors. All cells of the human body (other than sperm or ova) contain 23 pairs of chromosomes. The production of gametes (ova and sperms) entails a special form of cell division. This process produces cells that contain one member of each of the 23 pairs of chromosomes. A person"s chromosomal sex is determined at the time of fertilization of the ovum by the father"s sperm. The last pair of the 23 chromosomes determine the person"s sex (sex chromosomes) There are two types of sex chromosomes: x and y. All the ova that a woman produces will contain an x chromosome. When a man"s sex chromosomes divide, half will contain x and half will contain y.
