In Drosophila, Germ Cells Develop from Pole Nuclei Isolated from the Rest

question 8

Multiple Choice

In Drosophila, germ cells develop from pole nuclei isolated from the rest of the embryo at the posterior end. How are they "protected" from the effects of posterior concentrations of zygote-produced mRNAs and proteins?

• A)Their genes have unresponsive promoters.
• B)The cytoplasm at the pole is separated by a compartmentalizing membrane.
• C)The pair-rule, gap, and segmentation genes are not expressed in these cells.
• D)Homeotic genes in these cells are inhibited by zygotic genes from the mother.
• E)Paternal effects operate on the embryo only in the pole cells.

---

Definitions:

Price Change

An alteration in the cost of goods or services in the market.

Income

The amount of money received by an individual or entity, usually in exchange for labor or services, or through returns on investments.

Utility Function

A mathematical representation in economics that quantifies the satisfaction or happiness derived by a consumer from consuming goods and services.

Substitution Effect

The economic principle that as the price of a good rises, consumers will replace it with cheaper alternatives.