In the following pedigree the filled symbols indicate indivi

In the following pedigree, the filled symbols indicate individuals expressing a are genetic disorder. Is the disease phenotype dominant or recessive? Is the disease phenotype most likely to be auto normally linked. X-linked, or Y-linked? Based on your answers for (a) and (b). what is the most likely genotype of individual IV-8?

Solution

a. The disease follows an dominant phenotype. In this type affected children usually have an affected parent and the transmission is vertical. Usually, heterozygotes are affected.

b. The disorder follows an autosomal dominant pattern. Two affected parents produce unaffected children and both females and males are equally affected.

c. The most likely genotype of IV-8 would be Aa