BIOL 1020 Lecture Notes - Lecture 35: Panmixia, Allele Frequency, Sexual Reproduction

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1020
• Professor: Joy E.Stacey

Document Summary

Mutations and sexual reproduction produce the genetic variation that makes evolution possible: two processes, mutation and sexual reproduction, produce the variation in gene pools that contributes to differences among individuals. Variation within a population: both discrete and quantitive characters contribute to variation within a population, discrete characters can be classi ed on an either-or basis, quantitive characters vary along continuum within a population. Variation between populations: most species exhibit geographic variation, differences between a gene pool of separate populations or population subgroups. Mutation: mutations are changes in the nucleotide sequence of dna, mutations cause new genes and alleles to arise, only mutations in cell that produce gametes can be passed to offspring. Sexual reproduction: sexual reproduction can shuf e existing alleles into new combinations, in organisms that reproduce sexually, recombination of alleles is more important that mutation in producing the genetic differences that make adaptation possible.