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

question 4

Multiple Choice

$\begin{array} { c c c } \text { Sex } & \text { Phenotype } & \text { Number } \\\text { male } & \text { wild } & 123 \\\text { male } & \text { yellow } & 116 \\\text { female } & \text { wild } & 240\end{array}$ 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

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Definitions:

Dim Room

A dim room is a space where the lighting is intentionally kept low, either for ambiance, to reduce energy consumption, or to facilitate certain activities or experiments.

Widens

To become broader or more open in space or time.

Hue

A color or shade in the spectrum, distinguished by its wavelength of light.

Wavelength

The distance between successive crests of a wave, typically used in the context of electromagnetic waves.