Question

To inherit an autosomal dominant disorder a person could receive the disease causing allele from

A. the father only, not the mother.
B. the mother only, not the father.
C. the mother or the father.
D. the parent who does not exhibit the disease.
E. All answers are correct.

Answer 1

To inherit an autosomal dominant disorder, a person can receive the disease-causing allele from either the mother or the father. This is because the presence of just one dominant allele can lead to the expression of the disorder. Examples of such disorders include Huntington's disease and neurofibromatosis type I.

Step-by-step explanation:

To inherit an autosomal dominant disorder, a person could receive the disease-causing allele from C. the mother or the father. This is because autosomal dominant disorders are expressed by the presence of just one gene. An individual only requires one dominant allele to have the disease, which they could inherit from either parent. An example of such a disorder is Huntington's disease. Whether the heterozygous parent has neurofibromatosis Nn, and the other parent has the normal genotype nn, their offspring have a 50 percent chance of inheriting the disease-causing gene (N). Consequently, the genotype of the offspring can be Nn, indicating the presence of the disorder, or nn, indicating the absence of the disorder.