Genetic Variation Within Populations

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Presentation transcript:

Genetic Variation Within Populations How does variation within a population exist?

Genetic Variation A wide range of phenotypes in a population means there is a lot of genetic variation Genetic variation allows more individuals a chance of survival More differences, greater likelihood, one adaptation exists to help survival

Genetic Variation Genetic variation is stored in a population’s gene pool A gene pool contains all of the alleles in a population How frequently a certain allele occurs in a population is the allele frequency

How does genetic variation occur? Mutations Changes in new DNA can form a new allele Recombination Crossing over (prophase I of meiosis) Independent assortment Random fertilization

Crossing Over

Independent Assortment