The pedigree below tracks Duchenne Muscular Dystrophy (DMD) through several generations. DMD is an X-linked recessive trait.
Pedigree of family with Duchenne Muscular Dystrophy
Pedigree of family with Duchenne Muscular Dystrophy
If individuals I-1 and I-2 had another son, what is the chance that he would have DMD?
Choose 1 answer:
Choose 1 answer:
(Choice A)
0
%
0%0, percent
A
0
%
0%0, percent
(Choice B)
25
%
25%25, percent
B
25
%
25%25, percent
(Choice C)
50
%
50%50, percent
C
50
%
50%50, percent
(Choice D)
100
%
100%100, percent
D
100
%
100%