Principles of Inheritance and Variation Question 196

196. Minor changes at gene level are described as

(a) Point mutations

(b) Chromosomal mutations

(c) Reverse mutations

(d) Forward mutations

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Answer : a

Hints & Solution

(a) Gene mutation or point mutation is the change in expression of a gene caused by change in number, sequence and types of nucleotides. A mutation from a wild gene type to a new type is called forward mutation. Reversal of mutated gene to wild type is reverse mutation. Chromosomal mutations are changes in the morphology of chromosomes.



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