The person who first described polytene chromosomes was

Balbiani

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Walker and Allen

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Golgi

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Waldeyer

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Solution

The correct option is A Balbiani
The person who first described polytene chromosomes was Balbiani. Polytene chromosomes have characteristic light and dark banding patterns that can be used to identify chromosomal rearrangements and deletions. Dark banding frequently corresponds to inactive chromatin, whereas light banding is usually found at areas with higher transcriptional activity.

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