Polytene chromosomes found in the......are produced by a process of ....

Options :
  1. somatic cells of Drosophila melanogaster.....polytenization
  2. germ cells of crustaceans....homologous recombination
  3. Larval salivary glands....endoreplication
  4. Clitellum of earthworms......conjugation

Answer and Explanation :-

Answer: Option 3


Polytene chromosomes are found in the larval salivary glands and are produced by a process of endoreplication. During endoreplication multiple rounds of DNA replication produce many sister chromatids that remain synapsed together thus giving these chromosomes their puffy appearance.

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