Question

What effect will inbreeding tend to have on genotypic frequencies in a population?

• A. It will increase the frequency of genotypes that produce a dominant phenotype
• B. It will decrease the frequency of genotypes that produce a dominant phenotype
• C. It will increase the frequency of homozygous genotypes
• D. It will increase the frequency of heterozygous genotypes

Answer 1

The correct option is C It will increase the frequency of homozygous genotypes

Inbreeding increases the frequency of homozygous genotypes and decreases the frequency of heterozygotes. It may or may not increase the frequency of genotypes that produce a dominant phenotype. The key term here is homozygous vs heterozygous and not dominant vs recessive.