Question

the allele that causes huntington disease in humans is an example of a or an __________ that exerts its effects later in life. multiple choice recessive allele epistatic allele lethal allele semilethal allele environmental effect

Explanation:

Huntington disease is caused by a dominant - acting lethal allele that typically shows symptoms later in life. Recessive alleles require two copies to express the trait. Epistatic alleles affect the expression of other non - allelic genes. Semilethal alleles cause death in some individuals. Environmental effects are non - genetic influences.

Answer:

C. lethal allele