Question

question 7
original dna: tac aaa ata gca act
mutated dna: tac aaa tag caa ct
what type of mutation is the mutated dna strand above an example of?
hint :look at the end of the mutated dna!
substitution
deletion
insertion
addition

Explanation:

• Substitution: Involves replacing one nucleotide with another. Here, it's not just a single - nucleotide replacement in a way that fits substitution's typical impact on the codon - reading frame.
• Deletion: When a nucleotide (or nucleotides) is removed. In the original DNA “ACT” (three nucleotides) is changed to “CT” (two nucleotides) in the mutated DNA. This is a deletion of one nucleotide.
• Insertion/Addition: These involve adding nucleotides. But here, nucleotides are lost, not gained.

Answer:

deletion