Consider a gene with four alleles A₁, A₂, A₃, and A₄. If the cross A₁A₂ × A₂A₂ yields two offspring, what is the probability that they have the same genotype as each other? A)1/8 B)1/4 C)1/3 D)1/2 E)3/4

Question

Quizplus · Accepted Answer

The parent genotypes are A₁/A₂ and A₂/A₂. The first parent can produce gametes A₁ and A₂, while the second parent can only produce A₂. Therefore, the offspring can only be A₁/A₂ or A₂/A₂. The probability of both offspring having the same genotype is 1/2, as there are only two possible genotypes and each offspring is equally likely to be one or the other.

Consider a Gene with Four Alleles A1, A2, A3, and A4

Consider a Gene with Four Alleles A₁, A₂, A₃, and A₄