Light coloured peppered moth, Biston betularia gets changed to its darker variety Biston carbonaria, due to

Translocation of block of genes in response to carbon

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Deletion of gene segment caused by industrial pollution

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Mutation of single Mendelian gene for survival in carbon rich environment

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Impact of industrial carbon over melanin formation

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Solution

The correct option is B Impact of industrial carbon over melanin formation
Light-coloured variety of peppered moth (Biston betularia) changes to darker variety (Biston carbonaria) by the process of industrial melanism which allows them to hide from predators.
This change from a lighter colour to darker colour takes place due to mutation of the single Mendelian gene.
Hence, Light coloured peppered moth, Biston betularia gets changed to its darker variety Biston carbonaria, due to Impact of industrial carbon over melanin formation.
So, the correct answer is 'Impact of industrial carbon over melanin formation'.

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