So, how does a person inherit this genetic disorder? Is it dominant or recessive? Is it genetic or chromosomal?

Muscular Dystrophy is inherited by an X-Linked recessive pattern. This disease is more common among males than of females. You may ask why? In an X-Linked disease, the disease only affects the "X" chromosome. Males only have one "X" chromosome meaning that if it's passed down to the "X" chromosome, it's a 100% chance that it will lead to the disease. In females, though, there are two "X" chromosomes in the gene. So in order for a female to get the disease, the trait would have to affect both "X" chromosomes for the female to actually inherit the trait.  If a female is affected with the trait on just one "X," she can pass the trait on to her kids. Females who carry the trait but don't have the disease are known as carriers.