Polytene or giant chromosomes are found in

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(D) Polytene chromosomes are large,multi-stranded chromosomes formed through the process of endoreduplication,where $DNA$ replicates multiple times wi

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Salivary glands of Drosophila

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(D) Polytene chromosomes are large,multi-stranded chromosomes formed through the process of endoreduplication,where $DNA$ replicates multiple times without cell division.These chromosomes are commonly observed in the salivary glands of dipteran insects,such as $Drosophila$ (fruit fly).They consist of many parallel chromatids,often reaching $1000$ to $16000$ chromonemata,which makes them visible under a light microscope.

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