Question

question 7
a woman who is a carrier for a recessive x - linked disorder has children with a man who does not have the disease. which of the following is true of the couples children?
their sons have a 50 percent chance of having the disorder.
their sons have a 50 percent chance of being carriers.
all of their daughters will be carriers.
their daughters have a 50 percent chance of having the disorder.

Explanation:

In X - linked recessive inheritance, a carrier woman (X^AX^a) and a non - diseased man (X^AY) have sons with a 50% chance of getting the X^a allele and having the disorder (X^aY). Daughters have a 50% chance of being carriers (X^AX^a) and 50% chance of being non - carriers (X^AX^A). Sons cannot be carriers as they have only one X chromosome.

Answer:

Their sons have a 50 percent chance of having the disorder.