Select the incorrect match
Polytene chromosomes – Oocytes of amphibians
Submetacentric chromosomes – L-shaped
Allosomes - Sex chromosomes
Lampbrush chromosomes - Diplotene bivalents

Options

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

Explanation

To solve the question of selecting the incorrect match, we need to analyze each option provided:

1. **Polytene chromosomes – Oocytes of amphibians**
- Polytene chromosomes are large chromosomes that result from multiple rounds of DNA replication without cell division. They are typically found in the salivary glands of certain organisms, such as Drosophila (fruit flies), not in amphibian oocytes. Therefore, this match is **incorrect**.

2. **Submetacentric chromosomes – L-shaped**
- Submetacentric chromosomes have their centromere located slightly off-center, resulting in one arm being longer than the other. This shape indeed resembles an "L". Hence, this match is **correct**.

3. **Allosomes - Sex chromosomes**
- Allosomes refer to the sex chromosomes (like X and Y in humans) that determine the sex of an organism. This definition is accurate, making this match **correct**.

4. **Lampbrush chromosomes - Diplotene bivalents**
- Lampbrush chromosomes are large, extended chromosomes found in the oocytes of many amphibians during the diplotene stage of meiosis. They are characterized by their looped structure, which is transcriptionally active. Thus, this match is also **correct**.

Based on the analysis, the incorrect match is:

**Answer: Polytene chromosomes – Oocytes of amphibians**

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