Solutions For An Introduction to Genetic Analysis Chapter 2 Problem 61P

If my mother's brother is having the disease means, my mother is the carrier of the allele. The probability of my mother receiving the allele is , and I getting that allele from my mother am .

So, the probability that I have received this allele is.

My father does not have the allele, as he is not affected by the disease. So, I cannot receive the allele from my father. If my mother is heterozygous for that allele, I may inherit the allele. As she comes into the family pedigree, unrelated, the probability of me getting the allele is nothing. Below is the pedigree: