01:119:115 Lecture Notes - Lecture 20: Allele Frequency, Gene Pool, Sexual Reproduction
15 Nov 2017
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+ some phenotypes are either on or off . + some are gradations - vary along a continuum (2+ genes influence a. We are always looking at phenotypes: genetic variation. Sexual reproduction = new combinations of old alleles (recombination) Mutations are the only source of new alleles. Offspring has a combination of cards they receive from parents, some hands may be good or bad = recombining, nothing new created. + rapid (asexual) reproduction = lots of mutations. Detecting evolution in a population: population and allele frequencies. ***population - sexual interbreeding, same species, living in same area, share a gene pool. ***evolution - change in allele frequency over time. Population genetics - study of the variability of genetics within a population. Allele - one of two or more alternate versions of a gene. Fixed alleles - all individuals have same alleles ww or ww (no variation) Gene pool - all alleles of all genes in a population.
