Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Adrenoleukodystrophy ?
    ### Response:
    X-linked Adrenoleukodystrophy (ALD) is one of a group of genetic disorders called the leukodystrophies that cause damage to the myelin sheath, an insulating membrane that surrounds nerve cells in the brain. Women have two X chromosomes and are the carriers of the disease, but since men only have one X chromosome and lack the protective effect of the extra X chromosome, they are more severely affected.
    