Which muscle disorder is categorized as a genetic condition?

Muscular dystrophy is categorized as a genetic condition because it is caused by mutations in the genes that are responsible for the structure and function of muscles. These genetic abnormalities affect the production of proteins that are crucial for maintaining muscle integrity, leading to progressive muscle weakness and degeneration over time. Various types of muscular dystrophy exist, each associated with specific gene mutations and patterns of inheritance, making it primarily classified as a hereditary disorder.

In contrast, osteoarthritis, tendinitis, and rheumatoid arthritis are primarily acquired conditions influenced by factors such as age, wear and tear on the joints, repetitive strain, and autoimmune responses, rather than being directly caused by inherited genetic mutations. This distinction clearly positions muscular dystrophy as a genetic condition among the choices provided.