Case of Two Alleles and Two Subpopulations
To make a slight generalization of the above example, let and represent the allele frequencies of A in and respectively (and and likewise represent a).
Let the allele frequency in each population be different, i.e. .
Suppose each population is in an internal Hardy-Weinberg equilibriums, so that the genotype frequencies AA, Aa and aa are p2, 2pq, and q2 respectively for each population.
Then the heterozygosity in the overall population is given by the mean of the two:
which is always smaller than ( = ) unless
Read more about this topic: Wahlund Effect
Famous quotes containing the words case of and/or case:
“If a playwright tried to see eye to eye with everybody, he would get the worst case of strabismus since Hannibal lost an eye trying to count his nineteen elephants during a snowstorm while crossing the Alps.”
—James Thurber (1894–1961)
“Before I get through with you, you will have a clear case for divorce and so will my wife. Now, the first thing to do is arrange for a settlement. You take the children, your husband takes the house, Junior burns down the house, you take the insurance and I take you!”
—S.J. Perelman, U.S. screenwriter, Arthur Sheekman, Will Johnstone, and Norman Z. McLeod. Groucho Marx, Monkey Business, terms for a divorce settlement proposed while trying to woo Lucille Briggs (Thelma Todd)