A red-eyed male fruit fly is crossed with a white-eyed female fruit fly. Work out the possible genotype and phenotype of F1F1 and F2F2 generation. Comment on the pattern of inheritance in this cross?
When a red-eyed male fruit fly is crossed with a white-eyed female fruit fly, the offspring will have both white-eyed male & red-eyed female in the ratio of 1:1 in the F1F1 generation. In the F2F2 generation, 5050% females will be red-eyed and 5050% will be white-eyed, similarly, in males 5050% will be red-eyed and 5050% will be white-eyed. This result indicates that in fruitflies males transmit their sex-linked characters to their grandson through their daughter; such type of inheritance is called criss-cross inheritance.
