In Drosophila, the Recessive Allele P, When Homozygous, Determines Pink

Multiple Choice

In Drosophila, the recessive allele p, when homozygous, determines pink eyes.Pp or PP results in wild-type eye color.On the same chromosome of Drosophila that carries the p (pink eyes) locus there is another locus that affects the wings.Homozygous recessives, byby, have blistery wings, whereas the dominant allele By produces wild-type wings.The P and By loci are very close together on the chromosome; that is, the two loci are tightly linked.Assume that no crossing over occurs, and that the F₂ generation is produced by interbreeding the F₁ progeny.For the cross PPByBy  ppbyby, what is the genotype ratio of the F₂ generation?

A) 3 PPByBy : 1 ppbyby
B) 1 PPByBy : 3 ppbyby
C) 1 PPByBy : 2 PpByby: 1 ppbyby
D) 3 PpByby : 1 ppbyby
E) 1 PpByby : 3 PPByBy