Duchenne muscular dystrophy (DMD) is an X-linked recessive condition that causes rapid muscle degeneration. DMD occurs in approximately 1 in every 3500 males, but it rarely affects females.

Which statement most accurately explains why DMD affects males more often than females?

Choose 1

(Choice A)
A
The Y chromosome is slower to mature than the X chromosome.

(Choice B)
B
Replication of the X chromosome occurs more often in males.

(Choice C)
C
Male hormones cause the expression of X-linked traits.

(Choice D)
D
Males only have one copy of the X chromosome.