Question

Bruce has a genetic disorder. bruce and his wife, kim, have three children, one of which has the genetic disorder. how is this disorder most likely inherited? autosomal dominant.

Answer 1

This would be a recessive disease.

Father is dd
Mother is Dd (has to be because one child has the disease)

Parents cross is dd x Dd which gives rise to Dd (0.5) and dd (0.5). Each time they have a child they have a 50% chance of the child having the disease. In their case, only one of their 3 children is dd. The others though are carriers!