Inbreeding increases the frequency of what?

Explanation

Inbreeding increases the frequency of homozygous genotypes because mating between related individuals often results in offspring that have two identical alleles at specific loci. This is why option A is correct. On the other hand, heterozygous genotypes become less frequent due to the limited genetic variation available when closely related individuals mate, which makes option B incorrect. Inbreeding reduces genetic diversity by increasing homozygosity, thus reducing the variety of alleles in the population, rendering option C incorrect. Finally, while inbreeding might increase the expression of recessive alleles, it does not impact genetic linkage, which is the association of alleles on the same chromosome, so option D is incorrect.