The Genes for Purple Eyes and Curved Wings Are Approximately

Multiple Choice

The genes for purple eyes and curved wings are approximately 21 map units apart on chromosome II in Drosophila.Assume that a purple-eyed female was mated to a curved wing male and that the resulting F₁ phenotypically wild-type females were mated to purple,curved males.Of 1000 offspring,what would be the expected number of flies with purple eyes and curved wings?

A) 540
B) 395
C) 210
D) 790
E) 105