Which of the Following Is Correct Regarding the Regulation and Maintenance

question 39

Multiple Choice

Which of the following is correct regarding the regulation and maintenance of Hox gene expression in Drosophila?

• A) Proteins of the Polycomb and Trithorax groups maintain inactive and active states of Hox gene expression, respectively.
• B) If Polycomb or Trithorax group genes are defective, Hox gene expression patterns are still initiated, but cannot be correctly maintained.
• C) The remodeled chromatin at the Hox complex is heritable through cell generations.
• D) If all the Hox genes in an embryo are deleted, segmentation still occurs but distinct segment identities are lost.
• E) All of the above.

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Definitions:

Abiotic Components

The non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems.

Community

A group of interacting living organisms sharing a populated environment; in human contexts, it can also refer to a group of people with a common characteristic or interest.

Species Interaction

The interactions between different species within an ecosystem, which can include competition, predation, symbiosis, and mutualism, influencing the survival and reproduction of the species involved.

Precise Boundaries

Definite or exact limits or borders of an area, space, or concept.