Fruit Flies Normally Have Red Eyes -Which Strains' Mutations Represent a Complementation Group?
A)C, D, F

question 17

Multiple Choice

Fruit flies normally have red eyes.Seven different true-breeding strains of fly with white eyes have been identified (A-H) .In each strain, the white eye trait is due to an autosomal recessive allele.It is possible that all seven strains have mutations in the same gene.Alternatively, some or all of the strains may have mutations in different genes.To determine how many genes are involved in eye color in these flies, all possible pairwise crosses are performed.The offspring phenotypes resulting from each cross are observed.(+ = wild-type; ? = mutant)
$$\begin{array} { | c | c | c | c | c | c | c | c | c | } \hline & \mathrm { A } & \mathrm { B } & \mathrm { C } & \mathrm { D } & \mathrm { E } & \mathrm { F } & \mathrm { G } & \mathrm { H } \\\hline \mathrm { A } & - & - & + & + & - & + & + & - \\\hline \mathrm { B } & & - & + & + & - & + & + & - \\\hline \mathrm { C } & & & - & - & + & + & + & + \\\hline \mathrm { D } & & & & - & + & + & + & + \\\hline \mathrm { E } & & & & & - & + & + & - \\\hline \mathrm { F } & & & & & & - & - & + \\\hline \mathrm { G } & & & & & & & - & + \\\hline \mathrm { H } & & & & & & & & - \\\hline\end{array}$$
-Which strains' mutations represent a complementation group?

• A)C, D, F
• B)A, B
• C)E
• D)A, B, E, G, H

---

Definitions:

Risk Aversion

The tendency of investors to prefer safer investments over riskier ones to avoid loss.

Investors Prefer

Refers to investors' tendencies to favour certain assets, securities, or investment strategies based on risk, return, and personal preferences.

Expected Return

The predicted amount of profit or loss an investment generates based on historical performance or analyst forecasts.

Risk-Free Rate

The theoretical rate of return of an investment with zero risk, often represented by the yield of government securities.