Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Genetic Disorders ?
    ### Response:
    Genes are the building blocks of heredity. They are passed from parent to child. They hold DNA, the instructions for making proteins. Proteins do most of the work in cells. They move molecules from one place to another, build structures, break down toxins, and do many other maintenance jobs.
    