Population Genetics Flashcards
frequency of big A is
p
frequency of little a is
q
p + q =
1
individual frequencies of A and a will usually be the same in the ____ of either sex
gametes
frequency of AA zygotes is
p^2
frequency of Aa zygotes is
2pq
frequency of aa zygotes is
q^2
p^2 + 2pq + q^2 =
1
allele frequencies equation
p + q = 1
genotype frequencies equation
p^2 + 2pq + q^2 = 1
allele frequencies and genotype frequencies are typically…
constant over time
in a large randomly-mating population without selection
4 ways population frequencies can change
random chance (drift)
migration
natural selection
mutation (not enough to notice)
population frequencies can change rapidly 3 ways
random chance is population is small and isolated
heavy migration into a small population
intense natural selection in a large population
Hardy-Weinberg assumptions
large population
random mating
survival and reproduction are not affected by genotype (no selection)
genetic polymorphism
a gene has more than one allele in a population
ABO blood types