Sometimes, DNA brought by the phage does not integrate with the genome of the recipient bacterium and is lost after one or two generations such genetic recombination is called

Options

A. Generalised Transduction
B. Specific transduction
C. Abortive transduction
D. Conjugation

Answer

To solve the question, we need to identify the type of genetic recombination described in the scenario where DNA brought by a phage does not integrate with the genome of the recipient bacterium and is lost after one or two generations.

### Step-by-Step Solution:

1. **Understanding Transduction**:
- Transduction is a process where bacteriophages (viruses that infect bacteria) transfer genetic material from one bacterium to another. This can occur in two main forms: generalized transduction and specialized transduction.

**Hint**: Recall the definitions of generalized and specialized transduction to differentiate between them.

2. **Generalized Transduction**:
- In generalized transduction, any random piece of bacterial DNA can be transferred from one bacterium to another via a bacteriophage. However, this DNA can integrate into the recipient's genome.

**Hint**: Think about whether the DNA integrates into the recipient's genome in this type of transduction.

3. **Specialized Transduction**:
- In specialized transduction, specific genes are transferred when a bacteriophage incorporates a portion of the bacterial DNA into its own genome. This DNA can also integrate into the recipient's genome.

**Hint**: Consider if this type of transduction allows for the DNA to be lost after a few generations.

4. **Abortive Transduction**:
- Abortive transduction occurs when the DNA fragment introduced by the bacteriophage does not integrate into the bacterial chromosome. As a result, the DNA is not replicated during cell division, leading to its loss in subsequent generations.

**Hint**: Focus on the term "abortive" and how it relates to the integration and replication of DNA.

5. **Conjugation**:
- Conjugation is a different process where genetic material is transferred between bacteria through direct contact, typically via a pilus. This does not fit the scenario described.

**Hint**: Remember that conjugation involves direct contact between bacteria, unlike transduction.

6. **Conclusion**:
- Based on the definitions and explanations, the correct answer to the question is **abortive transduction**, as it describes the scenario where the DNA does not integrate into the recipient's genome and is lost after one or two generations.

### Final Answer:
The type of genetic recombination described is **abortive transduction**.