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Unformatted text preview: occurring... 3. Nonrandom mating - selection of mate according to phenotype (generated by alleles)
Selection of mate according to genotype or phenotype (not chance)
Sexual selection - favors characteristics that increase the likelihood of obtaining mates (hunkiest alleles). 4. Genetic drift - changes in allele frequencies due tondom chance (e.g. catastrophy)
' Refers to changes in the allele frequencies of a gene pool due to chance
Allele frequencies "drift" over time depending on which members die, survive, or reproduce.
LE More likely in small populations, where chance plays a large role
li 2 types - bottleneck and...
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This document was uploaded on 03/27/2014 for the course BIOLOGY Bio 2 at Timber Creek High.
- Fall '09