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NTA Abhyas NEET2020BotanyCell - The Unit of LifePractice

Select incorrect pairing.

Options

  1. AHeterosomes — Sex chromosomes
  2. BLampbrush chromosomes — Diplotene bivalents
  3. CPolytene chromosomes — Oocytes of amphibians
  4. DHeterochromatin - Darkly stained region of chromosome

Correct answer

C. Polytene chromosomes — Oocytes of amphibians

Step-by-step solution

Polytene chromosomes are oversized chromosomes that are developed from standard chromosomes. Specialized cells undergo repeated rounds of DNA replication without cell division (endomitosis), to increase cell volume, forming a giant polytene chromosome. They are present in the salivary glands of dipteran flies like Drosophila. Lampbrush chromosomes are a special form of chromosomes that are found in the growing oocytes (immature eggs) of most animals, except mammals. Lampbrush chromosomes are present in the amphibia

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