A cross between hybrid and either of any parent is called

Options

A. test cross
B. reciprocal cross
C. monohybrid cross
D. back cross

Explanation

To answer the question "A cross between hybrid and either of any parent is called," we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- A hybrid organism is the result of a cross between two different parents, typically involving different alleles for a trait.
- In genetics, we often refer to the parents as homozygous dominant and homozygous recessive.

2. **Identifying the Types of Crosses**:
- **Test Cross**: This is a cross between the F1 generation (hybrid) and a recessive parent to determine the genotype of the hybrid.
- **Back Cross**: This refers to the cross between the F1 generation (hybrid) and either of the original parent organisms (either dominant or recessive).
- **Reciprocal Cross**: This involves switching the roles of the male and female parents in two separate crosses.
- **Monohybrid Cross**: This involves a cross between two homozygous parents differing in one trait.

3. **Focusing on the Question**:
- The question specifically asks for the cross between a hybrid and either of the parents. This aligns with the definition of a back cross.

4. **Conclusion**:
- Therefore, the correct answer to the question is that a cross between a hybrid and either of any parent is called a **Back Cross**.

### Final Answer:
A cross between hybrid and either of any parent is called a **Back Cross**.

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