Which individual may be a carrier for a recessive X-linked trait in humans?

Question

Quizplus · Accepted Answer

A heterozygous female for an X-linked trait carries one copy of the recessive allele and one copy of the dominant allele. Since females have two X chromosomes, a female with one recessive allele (on one X chromosome) and one dominant allele (on the other X chromosome) does not express the recessive trait but can pass the recessive allele to her offspring, making her a carrier.

Which Individual May Be a Carrier for a Recessive X-Linked