Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to galactosemia ?
    ### Response:
    Mutations in the GALT, GALK1, and GALE genes cause galactosemia. These genes provide instructions for making enzymes that are essential for processing galactose obtained from the diet. These enzymes break down galactose into another simple sugar, glucose, and other molecules that the body can store or use for energy.
    