The bacterial and blue green algal cells contain

Options

A. Large number of linkage grups
B. Only one linkage group
C. Four linkage groups
D. No linkage group

Answer

**Step-by-Step Solution:**

1. **Understanding Linkage Groups**:
- Linkage groups refer to all the genes present on a single chromosome. Therefore, the number of linkage groups in a haploid organism is equal to the number of chromosomes in its haploid state.

2. **Identifying the Organisms**:
- The question mentions bacterial cells and blue-green algal cells (also known as cyanobacteria).

3. **Analyzing Bacterial Cells**:
- Bacteria typically have a single circular strand of DNA. This means that they possess only one chromosome in their haploid condition, leading to only one linkage group.

4. **Analyzing Blue-Green Algal Cells**:
- Blue-green algae (cyanobacteria) also contain a single circular DNA strand. Similar to bacteria, they have only one chromosome in their haploid state, resulting in one linkage group.

5. **Conclusion**:
- Since both bacterial cells and blue-green algal cells have only one chromosome each in their haploid state, they each contain one linkage group.

6. **Final Answer**:
- The correct answer is that both bacterial and blue-green algal cells contain **one linkage group**.

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