Question

Which of the following is classified as an autosomal dominant disorder?

a. Huntington's disease
b. Parkinson's Disease
c. Systemic lupus erythematosus
d. Raynaud's disease

Answer 1

The correct answer is a) Huntington's disease It's an autosomal dominant disorder, meaning an affected person only needs one copy of the mutant gene to develop the disease.

Answer 2

Huntington's disease is the autosomal dominant disorder listed, characterized by a single copy of a mutant allele causing neurological symptoms that typically manifest in middle age.

Step-by-step explanation:

The autosomal dominant disorder among the options provided is Huntington's disease. This genetic condition means that the presence of just one dominant allele will cause the individual to express the disease. In Huntington's disease, the mutant allele creates an abnormal protein with large repeats of the amino acid glutamine, which is toxic to neural tissue and leads to the characteristic symptoms. Once a person inherits this dominant allele, there is a 50% chance of passing the gene to their offspring, and because it can manifest later in life, they may unwittingly transmit it before symptoms appear.