Why are women often carriers of X-linked traits but rarely affected by them?

Question

Biology

Dayton Mcbride

4 April, 09:51

Why are women often carriers of X-linked traits but rarely affected by them?

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Answers (2)

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Melvin Hull · Answer 1

Most X-linked conditions are recessive. This means that in a person with two X chromosomes (most females), both copies of a gene (i. e., one on each X chromosome) must have a change or mutation whereas in a person with one X chromosome (most males), only one copy of a gene must have a mutation. A female with a mutation in one copy of a gene on the X chromosome is said to be a "carrier" for an X-linked condition

Nigel Goodwin · Answer 2

Most X-linked conditions are recessive. This means that in a person with two X chromosomes (most females), both copies of a gene (i. e., one on each X chromosome) must have a change or mutation whereas in a person with one X chromosome (most males), only one copy of a gene must have a mutation. A female with a mutation in one copy of a gene on the X chromosome is said to be a "carrier" for an X-linked conditionWomen have two x chromosomes, compared to men who have one x and one y chromosome. Because of the two x chromosomes, one of them can override the other. In men they only have one x and one y, they don't have the extra x chromosome to override the allele.