Duchenne muscular dystrophy (DMD) is caused by a gene on the human X chromosome. The patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. They rarely live past their 20s. How likely is it for a woman to have this condition?
A) Women can never have this condition.
B) One-half of the daughters of an affected man could have this condition.
C) One-fourth of the children of an affected father and a carrier mother could have this condition.
D) Very rarely would a woman have this condition; the condition would be due to a chromosome error.
E) Only if a woman is XXX could she have this condition.
Three Types of Muscular Tissue
Antisense RNA and RNA interference (RNAi) approaches to silence genes for gene therapy
An overview of the 5 types of gain, loss, or rearrangement of chromosome
The order of gene transfer in four Hfr strains
Human embryo at successive stages of development (not to scale).
PCR analysis showing expansion of the CAG repeat region of the HD gene