In a mutational event, when adenine is replaced by guanine, it is a case of
Transcription
Transition
Transversion
Frameshift mutation
The Correct Option is B
Solution and Explanation
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'
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Concepts Used:
Non-Mendelian Genetics
The term - non-mendelian inheritance refers to any pattern of heredity in which features do not separate according to Mendel's laws. These principles describe how features linked with single genes on chromosomes in the nucleus are passed down through generations.
Types of Non-Mendelian Inheritance
Codominance Inheritance
It is a form of incomplete dominance in which both alleles for the same feature are expressed in the heterozygote at the same time. For example, the MN blood types of humans.
Incomplete Dominance
In a heterozygote, the dominant allele does not always completely cover the phenotypic expression of the recessive gene, resulting in an intermediate phenotype which is referred to as "incomplete dominance”.