Multiple choice The total consequence of positive assortative mating is an increase in the frequency of heterozygotes (Aa) dominant homozygotes (AA) recessive homozygotes (aa) all homozygotes (AA and aa) Reveal answer Fill a bubble to check yourself D Correct answer Explanation The reason is that mating is between individuals with the same genotypes -- AA X AA, aa X aa, or Aa X Aa. The first 2 mating combinations only produce homozygous offsprings, while 50% of the offsprings of the latter are homozygous as well.