PROGRESSIVE muscular dystrophy was recognized over a century ago, and Gowers noted its familial occurrence soon afterward. The disease, which is similar in affected members of a family, may vary in ...

Chromosomal abnormalities can include two basic categories: numerical or structural. A structural abnormality can include an alteration to the structure of the chromosome, as the name suggests.

Retinitis pigmentosa (RP) is an eye condition that can be genetic. In this way, people usually need to inherit two copies of a genetic variation that causes RP, one coming from each parent. RP may ...