The Nurse Has Presented an In-Service to Nurses New to the Maternal-Child

The nurse has presented an in-service to nurses new to the maternal-child health care unit. Which statement indicates that teaching on genetic disorders has been successful?

A) "Down syndrome is an autosomal recessive condition.If both parents carry the gene, there is a 1-in-4 chance that a child will be affected."
B) "Galactosemia is a sex-linked condition.Both parents must carry the gene, and more girls than boys will be affected by this condition."
C) "Sickle-cell disease is a trisomy; the affected patient has three copies of a gene.Trisomies are more common in pregnancies of young women than those of older women."
D) "Huntington's disease is an autosomal dominant condition.Only one parent carries the gene, and males and females are equally affected by the disease."