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Giant polytene chromosomes are found in ___________

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Giant polytene chromosomes are found in ___________

(a) Egg of fruit fly

(b) Salivary gland of larvae of fruit fly

(c) Salivary gland of adult fruit fly

(d) All of the mentioned

I had been asked this question in semester exam.

Origin of the question is Genes, Chromosomes and Genomes in division Bioenergetics, Enzymes, Metabolism, Genes, Chromosomes and Genomes of Cell Biology

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Right choice is (b) Salivary gland of larvae of fruit fly

The explanation: Polytene chromosomes are a type of giant chromosomes which are many times longer in length than normal chromosomes. Polytene chromosomes are found in the salivary gland of a larval fruit fly and show several distinct darkly stained bands.

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