Question

The change of the lighter coloured variety of peppered moth Biston betularia to its darker variety (carbonaria) is due to [CBSE PMT 1995]
A) Mutation of single Mendelian gene for survival in the smoke-laden industrial environment
B) Deletion of a segment of gene due to industrial pollution
C) Industrial carbon deposited on the wings of moth resulting in darker variety
D) Translocation of a block of genes in chromosomes in response to heavy carbons

Answer 1

The change of the lighter coloured variety of peppered moth Biston betularia to its darker variety (carbonaria) is due to Translocation of a block of genes in chromosomes in response to heavy carbons