Question

Task 4: STAR® Connection Question

A deletion mutation occurs in the gametes of an organism. Both the original and new segments of DNA are shown below.
Original DNA: TACCATCTTTGG
New DNA: TACCACTTTGG
Which sequence of amino acids best represents the new peptide chain when the new DNA segment is translated?
A start, valine, glutamate, threonine
B start, valine, lysine
C start, leucine, phenylalanine, threonine
D lysine, glutamate, phenylalanine

Answer 1

Answer: A: The new DNA segment differs from the original by the deletion of a single nucleotide (C). This results in a frameshift mutation, which changes the reading frame of the codons and can have a significant impact on the resulting amino acid sequence.

The new sequence of codons would be:

TAC CAC TTT G

This would translate to the following sequence of amino acids:

Start - Valine - Histidine - Phenylalanine

Therefore, the best answer is A: start, valine, histidine, phenylalanine.

Step-by-step explanation: