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

To determine which option is incorrectly matched, let's examine each of the options:

1. Lampbrush chromosomes – Diplotene bivalents: Lampbrush chromosomes are indeed observed during the diplotene stage of meiosis. They are extended meiotic bivalents, giving them their characteristic appearance. Thus, this is correctly matched.
2. Submetacentric chromosomes – L-shaped chromosomes: In a submetacentric chromosome, the centromere is off-center, resulting in one arm being longer than the other. This gives them an "L" shape. Therefore, this option is correctly matched.
3. Allosomes – Sex chromosomes: Allosomes are chromosomes involved in sex determination and are commonly referred to as sex chromosomes. Hence, this option is correctly matched.
4. Polytene Chromosomes – Oocytes of amphibians: Polytene chromosomes are a special kind of chromosome resulting from repeated rounds of DNA replication without cell division, usually found in tissues such as the salivary glands of Drosophila (fruit flies). They are not typically found in the oocytes of amphibians. Oocytes of amphibians are known for having lampbrush chromosomes, not polytene chromosomes. Thus, this option is incorrectly matched.

Therefore, the incorrect match is:

• Polytene Chromosomes – Oocytes of amphibians