Population Genetics Flashcards
Define allelic diversity.
The mean number of alleles per locus.
How can allele frequency be calculated?
x/2N
x = number of chosen allele
N = population
What is observed heterozygosity?
The proportion of heterozygous individuals in a population/sample.
What is expected heterozygosity?
The expected value under Hardy-Weinberg Equilibrium, estimated from allelic frequencies.
What does inbreeding lead to in terms of allele frequency?
Excessive homozygotes.
What does outbreeding lead to in terms of allele frequency?
Excessive heterozygotes.
What is the island model of population structure?
All subdivisions can exchange migrants and distance does not affect gene flow.
What is the stepping-stone model of population structure?
Dispersal is more likely between adjacent subpopulations and distance impacts gene flow.
What is the isolation-by-distance model of population structure?
A series of overlapping neighbourhoods. Distance and dispersal ability impacts gene flow.
