Flashcards in 3.1 Population and Evolutionary Genetics Deck (9)
The study of the distribution and change in frequency of alleles within populations
A change in gene frequency over time in a population
Define natural selection
is the differential survival and reproduction of individuals due to differences in phenotype
Define artificial selection
selection by promoting the reproduction of organisms with traits perceived as desirable
Define homozygous by descent vs by state
Descent: alleles descended from the same copy in a common ancestor. State: Alleles that are the same in the structure and function but are descended from 2 dif copies of ancestors.
What is heterozygote advantage
Heterozygotes are favored over homozygotes and have a reproductive advantage which maintains both alleles in the population
What are the 5 assumptions of the Hardy-Weinberg law
Large population, random mating, no mutation, no migration, no natural selection
How can an isolated population be useful for identifying rare genetic variation?
These populations have reduced genetic diversity, thus rare variants may drift to higher frequencies