the pedigree below tracks duchenne muscular dystrophy (dmd) through several generations. Dmd is an x-linked recessive trait
if individual II-3 has a child with a carrier woman, what is the percent chance that child will be a daughter with DMD?
a) 0%
b)25%
c)50%
d)100%
b) 25%
Since DMD is an X-linked recessive trait, an affected male (with DMD) can only pass on the affected allele to his daughters. This means that if individual II-3 has a child with a carrier woman, there is a 25% chance that the child will be a daughter with DMD.