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Minor changes at gene level are described as
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- Point mutations
- Chromosomal mutations
- Reverse mutations
- Forward mutations
Correct Option: 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.
