Inbreeding is best described as

• A. The mating of animals that are more closely related than the average of the breed.
• B. The process of crossing animals from different species.
• C. A method to increase horn growth.
• D. A type of vaccination technique.

Answer: (A)

Inbreeding is mating animals that are more closely related than the average of the breed. When relatives mate, offspring are more likely to inherit identical gene copies from common ancestors, which increases homozygosity and can help fix specific traits within a line. This approach can create uniform offspring and concentrate desirable characteristics, but it also raises the risk of recessive genetic problems and reduces genetic diversity, making the population more vulnerable to health issues and environmental changes. The other ideas describe different concepts—crossing animals from different species is crossbreeding, not inbreeding; horn growth isn’t related to the genetic mating pattern; and vaccination relates to immunity, not selecting related mates.