PSYB32H3 Chapter Notes -Zygote, Human Genome Project, Amniotic Sac
Document Summary
Genotype: the particular set of genes that a person inherits from her parents. X 2 people has exactly the same genotype. Genotype interact with the environment produced phenotype. Phenotype: the observable and measurable expression of an individual"s physical and behavioral characteristics. Chromosome carry genetic information that helps direct development. 23 pairs: half from mom, half from dad (because chromosome is. Homologous similar in shape and function to one of the chromosomes) Meiosis: when male"s/female"s set of chromosomes is halved to produce a germ cell (sperm, egg) mix. Crossing over: in equivalent sections of homologous chromosomes randomly switch places so that genetic information is shuffled even more. Mitosis (occur in all autosome chromosomes that contain matching pairs and sex chromosomes): a cell duplicates chromosomes and then divides into daughter cells that have the exact same number of chromosomes as their parent cell. Genes never work in isolation, but always in combination with environmental influences.
