Multiple choice

Reduced penetrance is observed in

  1. Y-linked disorders

  2. X-linked recessive

  3. X-linked dominant

  4. Autosomal recessive

  5. Autosomal dominant
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Only one mutated copy of the gene will be necessary for a person to be affected by an autosomal dominant disorder. Each affected person usually has one affected parent. The chance a child will inherit the mutated gene is 50%. Autosomal dominant conditions  have reduced penetrance, which means although only one mutated copy is needed, not all individuals who inherit that mutation go on to develop the disease.

Keep practicing — related questions