Question Detail

BIO 101 BIO 101 Past Questions Objective Question

Question

What is the consequence of a frameshift mutation?
Options
A Change in one amino acid
B Complete alteration of downstream amino acid sequence
Correct Answer
C Duplication of a gene
D No effect on phenotype
Correct Answer

Option B is the correct answer.

Detailed Explanation

Frameshift mutations (insertions or deletions of nucleotides not in multiples of three) shift the reading frame of the genetic code. This changes every codon downstream from the mutation, usually resulting in a completely nonfunctional protein.

Hint

It throws off the entire reading frame of the gene.

Question Info