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This is the normal nucleotide sequence on a DNA strand: A—C—T—G—G—A—T What is a substitution?

A—C—T—G—C—G—A—T

A—C—T—G—A—T

A—G—T—G—G—A—T

A—C—U—G—G—A—U

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Ans.

A substitution mutation can be defined as a mutation, which occurs due to exchange of a nitrogenous base for another (such as adenine to cytosine). This mutation can change the sequence of DNA and may results in a completely different gene product, sue to change in codon sequence.

The sequence 'A—G—T—G—G—A—T' represents a substitution mutation for normal nucleotide sequence as second base (cytosine) is exchanged with guanine in mutated sequence.  

Thus, the correct answer is option). 'A—G—T—G—G—A—T.'

samueladesida43

The substitution mutation of the given DNA strand is A—G—T—G—G—A—T.

WHAT IS SUBSTITUTION MUTATION:

A mutation is any change in the sequence of nucleotides of a DNA. Mutation can be of different types dependent on how it occurs.

Substitution mutation is a type of mutation in which a nucleotide base replaces another in the sequence.

According to this question, a DNA strand is given as follows: A—C—T—G—G—A—T. A substitution mutation will occur to produce a sequence as follows: A—G—T—G—G—A—T.

Therefore, nucleotide C has been replaced by nucleotide G, hence, a substitution mutation.

Learn more about mutation at: https://brainly.com/question/21138551

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