Question

A mutation that involves the addition, subtraction, or substitution of a single base is known as: a. genetic drift. b. a basic mutation. c. polyploidy. d. a chromosomal aberration. e. a point mutation.

Answer 1

Answer: Option E) a point mutation

Explanation:

Point mutation is the exchange of a single nucleotide for another. It could be classified as: transition (change of a purine for another purine or a pyrimidine base for another pyrimidine); transversion (change of a purine base for a pyrimidine or a pyrimidine for a purine).

Also, Point mutation that occur within the protein coding region of a gene can be classified into different kinds, they are:

- Silent mutation

- Missense mutation

- Non-sense mutation

- Frameshift mutation - this is a kind of point mutation where a single nucleotide can be added or subtracted from the DNA sequence.

Thus, point mutation is the answer

Answer 2

Answer:

E) A point mutation

Explanation:

A point mutation is a genetic mutation where a single nucleotide base is replaced, inserted or deleted from a sequence of DNA or RNA.