Question

Which statement is true of recessive sex-linked traits such as color

blindness?
A: males inherit them only from their mothers
B: only males inherit them
C: females inherit them only from their fathers
D: females never inherit them

Answer 1

The correct statement is that males inherit recessive sex-linked traits like color blindness only from their mothers. Females can also inherit these traits but require two copies of the recessive allele.

Step-by-step explanation:

The statement that is true of recessive sex-linked traits such as color blindness is: males inherit them only from their mothers (Answer A). Since males have just one X chromosome, a recessive allele on that chromosome will result in the expression of the trait.

Females, however, have two X chromosomes and must inherit the recessive allele from both parents to express the trait. Females do inherit sex-linked traits, but they are less likely to express them because they need two copies of the recessive allele, unlike males who need only one. Therefore, statement A correctly describes the inheritance pattern for recessive sex-linked traits like color blindness in males.