Figure 141
-In a Drosophila Experiment, a Cross Was Made Between

$\begin{array} { c c c } \text { Sex } & \text { Phenotype } & \text { Number } \\\text { male } & \text { wild } & 123 \\\text { male } & \text { yellow } & 116 \\\text { female } & \text { wild } & 240\end{array}$ Figure 14.1
-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) not X- linked
B) a) dominant; b) not X- linked
C) a) dominant; b) X- linked
D) a) recessive; b) X- linked
E) none of the above

Correct Answer:

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