Huntington's disease, an autosomal dominant disorder, is expressed only with a homozygous phenotype.

a. True

b. False

Question

Biology

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16 May, 10:51

Huntington's disease, an autosomal dominant disorder, is expressed only with a homozygous phenotype.

a. True

b. False

+5

Answers (1)

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Aydin Parsons · Answer 1

B. False

Being autosomal "dominant" means that only one copy of the dominant allele need be present to cause the disorder.

So if H is the dominant Huntington allele, and h is normal, HH (homozygous dominant) or Hh (heterozygous) will lead to Huntington. Only homozygous recessive will be free from the disorder, or normal (hh).

Huntington's disease, an autosomal dominant disorder, is expressed only with a homozygous phenotype.a. Trueb. False

Huntington's disease, an autosomal dominant disorder, is expressed only with a homozygous phenotype.

a. True

b. False