A Young Woman and Her Husband Want to Start a Family

Multiple Choice

A young woman and her husband want to start a family. The young woman explains to the nurse that she had a retinoblastoma as a child. The woman and her husband are concerned about the chances of their son or daughter developing a retinoblastoma. What is important for the nurse to explain to the couple?

A) Retinoblastoma is an autosomal recessive inheritance in which each parent carries the gene mutation.
B) Retinoblastoma is an $\mathrm{X}$ -linked inheritance and all males inherit an $\mathrm{X}$ chromosome from their mothers.
C) Retinoblastoma is an autosomal dominant inheritance that has incomplete penetrance and can skip a generation.
D) Retinoblastoma is a pattern that is more horizontal than vertical; relatives of a single generation tend to have the condition.