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

question 72

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 p value from this test? (Pick the most accurate choice. )

• A)p > 0.5
• B)0.1 < p < 0.5
• C)p < 0.1
• D)p < 0.05
• E)p < 0.01

---

Definitions:

Telophase

The final stage of mitosis or meiosis in cell division when chromosomes de-condense, nuclear membranes re-form, and the cytoplasm typically divides, resulting in two separate cells.

Interphase

A phase of the cell cycle where a cell spends most of its life, preparing for cell division by replicating its DNA and increasing in size.

G₀ Phase

A phase in the cell cycle where cells are in a state of quiescence (inactivity) and not actively dividing.

Spindle Fibers

Protein structures that form during cell division, aiding in the separation of chromosomes.