Some Members of the Species D

question 26

Multiple Choice

Some members of the species D. bifasciata produce mostly female offspring if reared at or below 21°C. The causative agent of this condition (called sex ratio) is a protozoan infection that is lethal to most male larvae. How can you demonstrate that it is both inherited and extrachromosomal?

• A)Inject ooplasm of affected females into normal females and then mate these with normal males.
• B)Inject cytoplasm from somatic cells of an affected female into normal females and then mate them with normal males.
• C)Mate affected females with normal males and assess daughter somatic cells for presence of the protozoan.
• D)Perform reciprocal crosses of affected and normal individuals and examine the offspring for infection.
• E)Perform reciprocal crosses of affected and normal individuals and look for affected male offspring.

---

Definitions:

Oligopolistic Industry

An industry characterized by a small number of firms that have significant control over market prices and high barriers to entry.

Collusion

Collusion is an agreement between two or more parties, often in secret, to limit open competition by deceiving, misleading, or defrauding others of their legal rights, or to obtain an objective forbidden by law typically involving fraud or gaining an unfair market advantage.

Cartels

An agreement between competing firms to control prices or exclude entry of a new competitor in a market, often resulting in higher prices and restricted competition.

Informal Understandings

Unofficial agreements or practices among firms or individuals that dictate behavior without being legally binding.