In most cases, males experience more severe symptoms of the disorder than females. A person has two copies of almost every gene, one copy from mom and one copy from dad. See table at the end of this section.
Huntington diseaseMarfan syndrome. Leber hereditary optic neuropathy LHON. Genetic Alliance Monographs and Guides. One mutated copy of the gene in each cell is sufficient for a person to be affected by an autosomal dominant disorder.
This could occur in the two scenarios below. Philadelphia, PA: Elsevier Saunders; chap If both parents are carriers of the same mutated gene and both pass it to the child, the child will be affected.
X-linked dominant. Progeria very premature aging : Spontaneous mutation of one gene creates a dominant mutation that rapidly accelerates aging. Alport syndrome Dent's disease X-linked nephrogenic diabetes insipidus. Symptoms of Becker's muscular dystrophy typically occur in people who are years-old or older.
Inheritance Patterns It is important to understand the basic laws of inheritance to appreciate how conditions are passed on in a family. This could occur in the two scenarios below. Leber hereditary optic neuropathy LHON.