Question
Biology Question on Principles of Inheritance and Variation
In a mutational event, when adenine is replaced by guanine, it is a case of
A
Transcription
B
Transition
C
Transversion
D
Frameshift mutation
Answer
Transition
Explanation
Solution
Transition is a point mutation that changes a purine nucleotide to another purine (A <--> G) or a pyrimidine nucleotide to another pyrimidine (C <-->T). Approximately two out of three single nucleotide polymorphisms are transitions. Transitions can be caused by oxidative deamination and tautomerization So, the correct answer is 'Transition'