Use the Following Information to Answer the Question In a Drosophila Experiment, a Cross Was Made Between Homozygous

question 31

Multiple Choice

Use the following information to answer the question.
$$\begin{array} { c c c } \text { Sex } & \text { Phenotype } & \text { Number } \\\text { male } & \text { wild } & 123 \\\text { male } & \text { yellow } & 116 \\\text { female } & \text { wild } & 240\end{array}$$
In a Drosophila experiment, a cross was made between homozygous wild-type females and yellow-bodied males. All of the resulting F?s were phenotypically wild type. However, adult flies of the F? generation (resulting from matings of the F?s) had the characteristics shown in the figure. How is the mutant allele for yellow body inherited?

• A) It is not X-linked.
• B) It is X-linked.
• C) It is inherited by X inactivation.
• D) It is Y-linked.

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Definitions:

Experimental Confederate

An individual in a study who is secretly working with the researchers, posing as a participant but following a scripted behavior.

Facial Expressions

Visible contractions or movements of the muscles beneath the skin of the face, considered as a form of nonverbal communication.

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The ability to influence one’s emotions.

Flashbulb Memories

Vivid, detailed memories of significant or shocking events that feel as if they have been seared into the brain.