In Drosophila, Singed Bristles (Sn)and Carnation Eyes (Car)are Both Caused

question 43

Multiple Choice

In Drosophila, singed bristles (sn) and carnation eyes (car) are both caused by recessive X-linked alleles.The wild-type alleles (sn⁺ and car⁺) are responsible for straight bristles and red eyes, respectively.A sn car female is mated to a sn⁺ car⁺ male and the F₁ progeny are interbred.The F₂ are distributed as follows:
$$\begin{array} { | l | r | } \hline s n~ c a r & 55 \\\hline s n~ c a r^+ & 45\\\hline s n ^{+ c a r} & 45 \\\hline s n ^ { + c a r +} & \underline{55} \\\hline & 200 \\\hline\end{array}$$
-What is the ?² value for a chi-square test for goodness of fit of the null hypothesis?

• A)0.5
• B)1.0
• C)2.0
• D)0.4
• E)20

---

Definitions:

Audience

The group of individuals targeted or reached by a piece of content, speech, performance, or advertisement.

Noun

A category of words that denote a person, place, thing, or idea, essential components of sentences.

Affect

A term in psychology that refers to the experience of feeling or emotion.

Passive Voice

A grammatical structure where the object of an action becomes the subject of the sentence, and the actor is either less emphasized or omitted.