A) Polysomes
B) Autosomes
C) polytene chromosomes
D) none of the above
Correct Answer: C
Solution :
In polytene chromosome. Bridges counted 5149 dark bands in the polytenc chromosomes of Drosophila. Loss or gain of chromosome segments can be known. In different developmental stages different dark bands show swelling called puffs/Balbiani rings/bulb.
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