Which of the following is a pro of migration?

• A. It reduces genetic diversity
• B. It increases genetic diversity
• C. Outside animals have higher frequency of the desired allele
• D. It causes immediate inbreeding

Answer: (C)

Migration moves alleles between populations. When outsiders carry a higher frequency of the desired allele than the local population, bringing them in raises the frequency of that allele in the recipient group. This makes it a practical way to boost the presence of a favorable allele in a breeding program, helping improve the trait. While gene flow can also increase overall genetic variation and reduce differences between populations, the direct benefit shown here is transferring the higher-frequency allele from the outside population into the local one.