Question
Biology Question on Principles of Inheritance and Variation
Which of the following is not considered as a mutagen
A
UV radiation
B
Nuclear reaction
C
2-aminopurine
D
Lower temperature
Answer
Lower temperature
Explanation
Solution
Mutation can be artificially induced with the help of mutagenic agents which can be broadly classified as - (a) Physical mutagens (b) Chemical mutagens. Physical mutagens are mainly radiations like X rays, gamma rays, beta rays and neutrons. High temperature also causes mutations. Aminopurine is a chemical artificial base analogue of adenine. It can substitute adenine as well as can pair with cytosin. Similarly nuclear reaction cause great impact on the DNA and mutations are noticed in several generations due to nuclear reaction or explosion. Low temperature does not cause mutation.