Your genes make proteins which determine your eye color. How tall you are is partially determined by your genes, but may also be affected by your diet and your overall health as you grow. Genetics play no role in determining the language you speak. Your language is determined by exposure early in your life. No genes for musical ability have been found.
Genes do make proteins that determine ear and brain structure.
Exposure to music, training, and cultural reinforcement contribute to musical ability. Discuss other traits. Instructors People carry two genes for every trait, one contributed by your biological mother and one contributed by your biological father. Which one of the two genes is passed on is decided randomly, like flipping a coin. You can't purposefully flip heads.