Why is the size of your muscles is partly an acquired trait and partly dependent on DNA?

The size of muscles is influenced by both genetic factors and environmental factors, making it an acquired trait as well as a hereditary one. Genetic makeup determines baseline potential for muscle growth, including factors like muscle fiber composition and hormone levels. However, muscle size can be significantly increased through exercise, nutrition, and training, which are acquired traits that enhance genetic potential. This interplay between genetics and lifestyle ultimately shapes an individual's muscle development.