Figure 13.1 -In a Drosophila Experiment,a Cross Was Made Between Homozygous Wild-Type

Multiple Choice

Figure 13.1
-In a Drosophila experiment,a cross was made between homozygous wild-type females and yellow-bodied males.All of the resulting F₁s were phenotypically wild type.However,adult flies of the F₂ generation (resulting from matings of the F₁s) had the characteristics shown in the figure above:
(a) Is the mutant allele for yellow body recessive or dominant?
(b) Is the yellow locus autosomal (not X-linked) or X-linked?

A) (a) recessive;(b) X-linked
B) (a) recessive;(b) not X-linked
C) (a) dominant;(b) X-linked
D) (a) dominant;(b) not X-linked