Introduction to Population and Evolutionary Genetics

Deriving Genotypic Frequencies

Genotypic frequencies - describes the distribution of genotypes in a population

Example: blood type locus; two alleles , M or N, and three MM, MN, NN genotypes are possible (the following data was collected from a single human population)

Genotye # of Individuals Genotypic Frequencies
MM

1787

MM=1787/6129=0.289

MN

3039

MN=3039/6129=0.50

NN

1303

NN=1303/6129=0.21

Total

6129