During Drosophila Development, There Is a Regulatory Cascade of Gene

question 17

Multiple Choice

During Drosophila development, there is a regulatory cascade of gene activation. The proper sequence for this cascade is ________.

• A) bicoid, gap genes, pair-rule genes, and segment-polarity genes
• B) bicoid, pair-rule genes, gap genes, and segment-polarity genes
• C) bicoid, segment-polarity genes, gap genes, and pair-rule genes
• D) bicoid, gap genes, segment-polarity genes, and pair-rule genes

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Definitions:

Oligochaetes

A group of segmented worms, including earthworms, characterized by having a relatively small number of chaetae (bristles) compared to other polychaetes.

Proglottid

A segment of a tapeworm, containing both male and female reproductive organs, which can produce eggs and eventually detach from the main body.

Fertilized Eggs

Eggs that have been inseminated by sperm, initiating embryonic development that can lead to the birth of an offspring.

Prialt

A powerful painkiller derived from cone snail venom, used for treating severe chronic pain in certain conditions.