Question

Select the incorrect match :

• A. Lampbrush chromosomes – Diplotene bivalents
• B. Submetacentric chromosomes – L-shaped chromososmes
• C. Allosomes – Sex chromosomes
• D. Polytene Chromosomes – Oocytes of amphibians

Answer 1

The Correct Option is D

The question tests your knowledge of different types of chromosomes and their unique characteristics or associations. Let's evaluate each option to find out which one is incorrectly matched:

1. Lampbrush chromosomes – Diplotene bivalents: Lampbrush chromosomes are indeed observed in the diplotene stage of meiosis, primarily in oocytes. They appear as bivalents (paired homologous chromosomes) with extended loops, allowing extensive transcription.
2. Submetacentric chromosomes – L-shaped chromosomes: Submetacentric chromosomes have their centromere slightly off the center, producing one longer and one shorter arm, often giving them an "L" shape appearance. This description is correct.
3. Allosomes – Sex chromosomes: Allosomes refer to chromosomes that determine the sex of an organism, commonly known as sex chromosomes, such as X and Y in humans. This is a correct association.
4. Polytene Chromosomes – Oocytes of amphibians: Polytene chromosomes are primarily found in the salivary glands of insects such as Drosophila. They are giant chromosomes with many DNA strands and are not typically found in amphibian oocytes. Hence, this is the incorrect match.

Therefore, the incorrect match in the given options is Polytene Chromosomes – Oocytes of amphibians.

This question tests your understanding of different cellular structures and their typical locations or associations. By process of elimination, rational reasoning, and matching your knowledge of chromosome types with their correct associations, you can ascertain that the option related to polytene chromosomes is incorrect.