Cross between recessive parent and `F_(1)` hybrid is called :

Options

A. Back cross
B. test cross
C. Monohybrid cross
D. Dihybrid cross

Answer

To solve the question about the cross between a recessive parent and an F1 hybrid, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **F1 Hybrid**: This is the first generation offspring resulting from a cross between two different parental types, typically one homozygous dominant and one homozygous recessive.
- **Recessive Parent**: This is the parent that carries two recessive alleles for a trait.

2. **Identify the Cross**:
- The question specifies a cross between a recessive parent and an F1 hybrid.

3. **Define the Types of Crosses**:
- **Test Cross**: This is specifically defined as the cross between an F1 hybrid (which could be heterozygous) and a homozygous recessive parent. This type of cross is used to determine the genotype of the F1 hybrid.
- **Back Cross**: This involves crossing the F1 hybrid with one of the original parents (which could be either homozygous dominant or homozygous recessive).
- **Monohybrid Cross**: This is a cross between two individuals differing in a single trait, typically involving one homozygous dominant and one homozygous recessive parent.

4. **Determine the Correct Answer**:
- Given the definitions, the cross between the recessive parent and the F1 hybrid is specifically called a **Test Cross**.

5. **Conclusion**:
- Therefore, the correct answer to the question is **Test Cross**.

### Final Answer:
The cross between a recessive parent and an F1 hybrid is called a **Test Cross**.

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