LIFESCI 1 Lecture Notes - Lecture 4: Gene Pool, Microevolution, Meiosis
Document Summary
Meiosis promotes genetic variation: individual tness is related to the relative number of offspring from and individual in the population. The unit of evolution: population: group of individuals in the same species in the same place at the same time. Gene pool: total collection of genes in a population at any one time. Microevolution: change in relative frequencies of alleles in a gene pool over time. Punnett square: mating before two individuals gives us the probability of the genotype of the offspring, heterozygous v homozygous, dominant v recessive. Hardy-weinberg principle: p^2 + 2pq + q^2 = 1, assumptions. Natural selection: increase in traits that enhance reproduction in generations: sexual selection. No genetic drift: random sampling from random population. No gene ow: random with respect to tness of individuals. No mutation: source of genetic variation (microevolutionary change)
