In Drosophila, the Genes for Body Coloration and Eye Size

Multiple Choice

In Drosophila, the genes for body coloration and eye size are on different chromosomes.Normal-colored bodies are dominant to ebony-colored (very dark) bodies, and normal-sized eyes are dominant to being eyeless.Line A is true breeding for normal body and normal eye, whereas line B is true breeding for ebony bodies and being eyeless.From a dihybrid cross between lines A and B, 480 flies are scored.How many F₂ flies are expected to have both ebony body color and to be eyeless?

A) 1
B) 30
C) 90
D) 120
E) 270