PS263 Chapter Notes - Chapter 4: Chemokine, Epigenetics, Medial Geniculate Nucleus
Document Summary
Genes: units of heredity that maintain their structural identity from one generation to another. Genes come in pairs because they are aligned along chromosomes (strands of genes) Homozygous: identical pair of genes on the 2 chromosomes. Heterozygous: unmatched pair of genes e. g. you have a gene for blue eyes & brown eyes. A child has a 25 % chance of being homozygous of dominant gene (tt), 25% chance of being homozygous for recessive gene (tt) & a 50% chance of being heterozygous (tt) Mutation heritable change in dna molecule: type of mutation is replication/duplication of a chromosome (tiny part of chromosome appearing twice or getting deleted, can be an explanation for brain-relevant genes for schizophrenia. High heritability when variations in some characteristic depend largely on genetic differences. Any estimate of the heritability of a trait is specific to a given population.
