Respuesta :

The gene allows the body to produce a protein.

Answer:

Genes affect the trait by expression of their respective proteins.

Explanation:

Genes are the stretch of DNA that code for a specific protein through the process of translation. The protein regulates the morphological expression of a trait.

Example: The gene for skin colour codes for melanin pigment in human. The higher concentration of pigment in skin cells impart darker skin tone.