The Hardy–Weinberg principle relies on a number of assumptions: (1) random mating (i.e, population structure is absent and matings occur in proportion to genotype frequencies), (2) the absence of natural selection, (3) a very large population size (i.e., genetic drift is negligible), (4) no gene flow or migration, (5) …

One of the Hardy-Weinberg assumptions states that all genotypes in the population are free of selective advantage. What influence might a selective advantage of a genotype have on a Hardy-Weinberg equilibrium? Certain alleles will reach the next generation on a nonrandom basis, thus upsetting the equilibrium.

Which of the following is not an assumption of Hardy-Weinberg equilibrium? * Populations must select non-random mates. * No selection must be taking place. * Mutations are not occurring.

Mating closely related animals on purpose, like brother and sister or father and daughter matings, results in an increased probability that the offspring of the mating will receive the same allele from both parents. This results in increased homozygosity, and thus in inbreeding.

What is a major disadvantage of inbreeding? Inbreeding is detrimental to reproductive performance and preweaning and postweaning growth. They are also most susceptible to environmental stresses.

Inbreeding is more common in the following states:

• Georgia.
• South Carolina.
• North Carolina.
• Virginia.
• West Virginia.
• Maryland.
• Delaware.
• Maine.

Inbreeding increases the risk of recessive gene disorders Inbreeding also increases the risk of disorders caused by recessive genes. These disorders can lead to calf abnormalities, miscarriages and stillbirths. Animals must have two copies of a recessive gene to have the disorder.