ANT202H5 Lecture Notes - Lecture 4: Genotype Frequency, Assortative Mating, Allele Frequency
Document Summary
Homozygotes = copies of same allele: alleles are segregated independently in formation of gametes, also independently assorted among individuals of population. Hardy-weinberg principle: absence of non-random mating & evolutionary forces, genotype & allele frequencies remain same from one generation to next, how fast population changing, predicting outcomes of matings or crosses. Standard to measure changes in allele frequency in a population. No genetic drift: no emigration or immigration = no gene flow, no mutations = no new alleles added to the gene pool, no natural selection = all traits aid equally in survival, random mating = no sexual selection. Many barriers, geographically and culturally: mating not random in natural populations. Other forms of isolation i. e. inbreeding, assortative mating (similar phenotypes mate more frequently than expected) Hardy-weinberg: probability of individuals receiving each allele is equal to allele frequency in population. Q = frequency of recessive allele: p & q vary between 0 & 1, must know genotypic frequency.
