Final Answer:
The gene responsible for the alanine-rich region that suppresses leg development in the abdomen of insects is B. Abdominal-B. Therefore, the correct option is B.
Step-by-step explanation:
The Abdominal-B (Abd-B) gene in insects plays a crucial role in specifying the identity of segments in the abdomen. The product of this gene includes an alanine-rich region, which is believed to contribute to the suppression of leg development in the abdominal segments.
This unique feature highlights the regulatory function of the Abd-B gene in ensuring the appropriate development and differentiation of body segments along the anterior-posterior axis in insects.
The alanine-rich region in the product of the Abdominal-B gene acts as a key element in the molecular mechanisms that control the patterning of insect body segments. It is involved in suppressing the formation of legs in the abdomen, allowing for the specialized development of abdominal structures.
Understanding the function of genes like Abdominal-B provides insights into the intricate genetic processes that orchestrate the formation of diverse body segments during insect development, contributing to our broader comprehension of developmental biology.
In summary, the Abdominal-B gene, with its alanine-rich region, is a pivotal player in the regulation of leg development within the abdomen of insects.
Therefore, the correct option is B.