Question

A scientist is investigating mutations. She observes a mutation where one or more nucleotides are inserted into a sequence of DNA. The scientist claims that this insertion mutation will affect genetic variability. Is the scientist correct? Why or why not?
A
Her claim is incorrect because inserted nucleotides are not translated along with the original DNA sequence.

B
Her claim is correct because changing the DNA sequence will alter the amino acid sequence that codes for traits.

C
Her claim is incorrect because adding more nucleotides in a DNA sequence does not alter the coding of proteins.

D
Her claim is correct because lengthening the DNA sequence will keep genetic information stable during meiosis.

Answer 1

Answer;

B. Her claim is correct because changing the DNA sequence will alter the amino acid sequence that codes for traits.

Explanation;

• Genetic mutations caused by the insertion or deletion of one or more nucleotides causes a change in the amino acid sequence from the site of the mutation forward.
• Insertions and deletions results to frame-shift mutations when base pairs that are not a multiple of three are added to or deleted from the sequence.This type of gene mutation alters the template from which amino acids are read, it thus alters the amino acid sequence that codes for characteristics shown by an organism.