Question

Which of the following statements is incorrect with respect to Drosophila?

• A. The life cycle completes in two weeks time
• B. Presence of XY-system of sex determination
• C. White eye is a wild type character
• D. 3+1 set of autosomes and allosomes

Answer 1

The correct option is C White eye is a wild type character

Drosophila melanogaster completes its life cycle in about two weeks and produces a large number of progeny in single mating. The sexes are separate and male and female flies are easily distinguishable, they follow the XY system of sex determination. They are diploid and have eight chromosomes (3 pairs of autosomes and one pair sex chromosomes). Eye colour variation is one of the heritable variations in Drosophila which can be seen with a low-power microscope, where red-eye is a wild type characteristic.
The white eye is a mutant or special type, not the wild type character.