Question 65
(Multiple Choice)
-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.Consider the following questions:
(a)Is the mutant allele for yellow body recessive or dominant?
(b)Is the yellow locus autosomal or X-linked?
A)(a)recessive; (b)X-linked
B)(a)recessive; (b)autosomal
C)(a)dominant; (b)X-linked
D)(a)dominant; (b)autosomal
E)(a)co-dominant; (b)X-linked
Answer