People who have two copies of the same abnormal autosomal dominant gene are generally

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People who have two copies of an abnormal gene are usually more severely affected by the disorder because they have no normal gene to compensate and maintain normal function. Those mildly affected with the disorder will have only one copy of the abnormal gene. Infertility may or may not be caused by chromosomal defects. A carrier of a trait has one recessive gene.

People Who Have Two Copies of the Same Abnormal Autosomal