a DNA segment has base order AGC TTA TCG. which copy exhibits a frameshift mutation through deletion?
A ) TTA TCG
B ) AGC TCG
C ) AGC TTT CG
D ) AGC TTA TAG
The correct answer is D) AGC TTA TAG.
A frameshift mutation occurs when nucleotides are inserted or deleted from a DNA sequence, causing a shift in the reading frame. In this case, the original DNA segment is "AGC TTA TCG". If we delete the nucleotide "T" after the "A" in the third position, the new sequence becomes "AGC TTA TAG". This deletion causes a frameshift mutation as it shifts the reading frame and alters the subsequent codons.