Question

Huntington's disease is an example of a genetic disorder caused by:

Select the correct option:
a) A late-acting recessive allele
b) A nonlethal dominant allele
c) A late-acting lethal dominant allele
d) Homozygous recessive alleles

Answer 1

Huntington's disease is caused by a nonlethal dominant allele and follows an autosomal dominant pattern of inheritance, with symptoms usually appearing later in life.

Step-by-step explanation:

Huntington's disease is an example of a genetic disorder caused by a nonlethal dominant allele. This means that the presence of the dominant allele (even a single copy) will cause the disease. Individuals with Huntington's disease typically exhibit symptoms later in life, often after they have already had children, which allows the dominant allele to be passed on. This pattern of inheritance is known as autosomal dominant. It is important to note that while Huntington's disease is inevitably fatal and leads to death, the term dominant lethal can be misleading because the disease manifests symptoms typically after the individual reaches reproductive age and may have already passed on the gene to offspring.

Answer 2

Huntington’s Disease is caused by a dominant allele of the repetition of the CAG in someone’s DNA. So the answer is NEITHER “A” or “D”

The answer would be “C” , since Huntington’s Disease is caused by a dominant allele. If an individual has two dominant alleles from their parents, they’re likely to get the disease. (Which would affect them later in life)