Duchenne [duh-SHEEN] muscular dystrophy is the result of a recessive disease allele [uh-LEEL] for a gene on the X-chromosome. Which of the following is true regarding inheritance of the disease?

W) Females have twice the chance of developing it, because they have two X chromosomes X) Mothers with the disease allele can pass it with equal probability to sons or daughters Y) Inbreeding has no effect on the likelihood of inheriting this disease Z) An affected son is always produced if his father has the disease allele
X) MOTHERS WITH THE DISEASE ALLELE CAN PASS IT WITH EQUAL PROBABILITY TO SONS OR DAughtERS