Which statement reflects the criterion for autosomal-dominant transmission of single-gene traits?
A)The risk for a person who is homozygous for the trait to transmit the trait to his or her children is 100% with each pregnancy.
B)The trait often remains unexpressed within a kindred for many generations until a change in environment promotes its expression.
C)Males in a kindred are more likely to express the trait when the mother has the trait, and females in a kindred are more likely to express the trait when the father has the trait.
D)Females in a kindred are more likely to express the trait when the mother has the trait, and males in a kindred are more likely to express the trait when the father has the trait.

Question

Quizplus · Accepted Answer

With homozygosity of the autosomal-dominant trait, the parent only has a dominant allele to transmit. Therefore, any child this person produces will have received the trait allele and is likely to express it. Dominant traits are usually expressed and do not remain unexpressed from one generation to another. For autosomal-dominant transmission, the genders of the parent and of the child are unimportant. Both males and females transmit the allele equally to sons and daughters.

Which Statement Reflects the Criterion for Autosomal-Dominant Transmission of Single-Gene