BIOL 1020 Lecture Notes - Lecture 35: Human Skin Color, Allele Frequency, Microevolution

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

Document Summary

Mutation 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 between populations: most species exhibit geographic variation, differences between gene pools of separate populations or population subgroups (separated by geographical space) Mutation: mutations are changes in the nucleotide sequence of dna, mutations cause new genes and allele to arise only mutations in cells that produce gametes can be passed to offspring. Sexual reproduction: sexual reproduction can shuffle existing alleles into new combinations in organisms that reproduce sexually, recombination of alleles is more important than mutation in producing the genetic differences the make adaptation possible. The hardy-weinberg equation can be used to test whether a population is evolving: the first step in testing whether evolution is occurring in a population is to clarify what we mean by a population.