Linkage group in E.coli is/are:

Options

A. 4
B. 2
C. 1
D. 5

Answer

To determine the number of linkage groups in E. coli, we can follow these steps:

### Step-by-Step Solution:

1. **Define Linkage Groups**:
Linkage groups refer to a set of genes that are inherited together due to their location on the same chromosome. The number of linkage groups in an organism corresponds to the number of chromosomes in its basic set.

2. **Understand Basic Set of Chromosomes**:
The basic set of chromosomes is also known as the haploid set, which represents the number of chromosomes present in a gamete (sperm or egg cell).

3. **Identify the Chromosome Count in E. coli**:
E. coli is a prokaryotic organism, which means it lacks a defined nucleus and typically has a simpler structure than eukaryotes. E. coli has a single circular chromosome.

4. **Determine the Number of Linkage Groups**:
Since E. coli has only one chromosome in its haploid set, it follows that the number of linkage groups is equal to the number of chromosomes. Therefore, E. coli has one linkage group.

5. **Conclusion**:
The number of linkage groups in E. coli is 1.

### Final Answer:
The number of linkage groups in E. coli is 1.

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