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Polytene chromonemata in Drosophila is ...

Polytene chromonemata in Drosophila is
(a) 10 times larger than somatic chromosome
(b) 50 times larger than somatic chromosome
(c) 10 to 50 times larger than somatic chromosome
(d) About 500 times larger than somatic chromosome

A

10 times larger than somatic chromosome

B

50 times larger than somatic chromosome

C

10 to 50 times larger than somatic chromosome

D

About 500 times larger than somatic chromosome.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the size of polytene chromonemata in Drosophila, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Polytene Chromonemata**: - Polytene chromosomes are specialized chromosomes that are found in certain tissues of Drosophila, particularly in the salivary glands of the larvae. They are formed by the replication of DNA without cell division, leading to a large, multi-stranded structure. 2. **Comparing Sizes**: - The question asks how much larger polytene chromonemata are compared to somatic chromosomes. Somatic chromosomes are the standard chromosomes found in the body cells of an organism. 3. **Researching Polytene Chromosome Size**: - Polytene chromosomes are known to be significantly larger than somatic chromosomes. They can be observed under a microscope due to their size and distinct banding patterns. 4. **Finding the Correct Size Ratio**: - According to biological studies, polytene chromosomes can be about 200 to 500 times larger than somatic chromosomes. This information is crucial for determining the correct answer among the options provided. 5. **Evaluating the Options**: - (a) 10 times larger than somatic chromosome: Incorrect. - (b) 50 times larger than somatic chromosome: Incorrect. - (c) 10 to 50 times larger than somatic chromosome: Incorrect. - (d) About 500 times larger than somatic chromosome: Correct. 6. **Conclusion**: - Based on the information gathered, the correct answer is (d) About 500 times larger than somatic chromosome. ### Final Answer: (d) About 500 times larger than somatic chromosome.
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