In Drosophila,the Allele Red Eyes (Bw+)is Dominant to the Allele

Multiple Choice

In Drosophila,the allele red eyes (bw+) is dominant to the allele for brown eyes (bw) .At another gene locus on the same chromosome,the allele for thin wing veins (hv+) is dominant to the allele for heavy wing veins (hv) .Flies homozygous for bw and hv+ are crossed to flies homozygous for bw+ and hv to obtain doubly heterozygous F₁ progeny.
-Given that these two gene loci are very closely linked,the genotypic ratio in the F₂ generation should be closest to

A) 1:2:1
B) 1:1:1:1
C) 9:3:3:1
D) 3:1