What is needed for a person to be affected by an autosomal dominant disorder?

• Correct Answer: one mutated allele
• one isolated allele
• extra alleles
• one less chromosome

Explanation: Autosomal Dominant Only one mutated allele is needed for a person to be affected by an autosomal dominant disorder . Each affected person usually has one affected parent. There is a 50% chance that a child will inherit the mutated gene. Huntingtons disease, Achondroplasia, Neurofibromatosis 1, Marfan Syndrome, Hereditary nonpolyposis colorectal cancer.

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