Use the Following Information to Answer the Following Questions

question 79

Multiple Choice

Use the following information to answer the following questions.
In Drosophila after ~100 minutes postfertilization, the embryo looks like the following diagram, with all nuclei having moved to the periphery and, subsequently, four of the nuclei being sequestered at the posterior end.

Drosophila embryo after about 2 hours.
-Formation of the pole cells (the four sequestered cells) demonstrates the role of

• A) segmentation genes.
• B) homeotic genes.
• C) maternal effect genes.
• D) zygotic genes.
• E) all of the above.

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Definitions:

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