If you have two parents that have the eye-color genes Bb and Bb and they have a baby, what is the probability that the baby has blue eyes?
all of the possible allele combinations that the baby could inherit from her parents are: BB, Bb, bB, bb.
In this problem, is it right to see the allele combinations Bb and bB as a single combination and, thus, say that the number of the total outcomes is 3?
Best Answer
If the first allele denotes the allele inherited from the father and the second allele denotes the allele inherited from the mother, then there are four equally likely outcomes: BB, Bb, bB, and bb.
If you wish to simply represent the potential genotypes of a child, there are three possible outcomes, where we do not distinguish between the allele inherited from the father and the allele inherited from the mother. They are BB, which occurs with probability $0.25$; Bb, which occurs with probability $0.50$; and bb, which occurs with probability $0.25$.