PSYB32H3 Chapter Notes - Chapter 2: Twin, Mendelian Inheritance, Y Chromosome
Document Summary
Genotype: particular set of genes that a person inherits from her parent. Phenotype: created by the interaction of a persons genotype or genetic makeup with the environment the visible expression of the person particular physical and behavioral characteristics. Zygote: sperm and egg unite to create a new living organism that has potential to develop into a human being this organism is called a zygote. Ovum/egg- largest human cell, about 90,000 times as heavy as the sperm that penetrates it, it is a female germ cell or egg. Chromosomes: thread like structures located in the central portion or nucleus of a cell that carry genetic info to help direct development. 46 pair of chromosomes come from half and half father and mother, this pairing is possible because each chromosome is homologous to one of the chrosomoes contributed by the mothrs egg. During meiosis all cells replicate themselves as if they were about to undergo mitosis or normal cell division.
