Principles of Inheritance and Variation Question 154

154. Which one of the following is a wrong statement regarding mutations?

[2012M]

(a) Deletion and insertion of base pairs cause frame-shift mutations.

(b) Cancer cells commonly show chromosomal aberrations.

(c) UV and Gamma rays are mutagens.

(d) Change in a single base pair of DNA does not cause mutation.

Show Answer

Answer : d

Hints & Solution

(d) Change in single base pair of DNA is also a type of mutation called point mutation. It is a type of mutation that causes the replacement of a single nucleotide with another nucleotide of the genetic material, DNA or RNA. For example, a point mutation is the cause of sickle cell disease.