PSYC 2450 Chapter Notes - Chapter 3: Miscarriage, Fetus, Behavioural Genetics
9 Dec 2015
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Genotype the genes that a person inherits. Phenotype a person"s observable or measurable characteristics. When an egg is fertilized by a sperm a biochemical reaction prevents other sperm from repeating fertilization. The genetic material is released from the ovum and sperm cell, and a new nucleus forms, creating a zygote. The nucleus contains 46 chromosomes that are paired into 23"s, each of which contains thousands of genes the basic units of heredity. Growth of the zygote and production of body cells. As the zygote moves towards the uterus it performs mitosis, the process in which a cell duplicates its chromosomes and then divides into two identical daughter cells. In addition to body cells humans have germ cells that serve the purpose of producing gametes (sperm/eggs). Independent assortment is the principal stating that each pair of chromosomes segregates independently of all other pairs during meiosis.
