A cross involving parents differing only in one trait is

Options

A. Haploid
B. Diploid
C. Monohybrid
D. Dihybrid

Answer

To solve the question, "A cross involving parents differing only in one trait is," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- First, we need to understand what the terms haploid, diploid, monohybrid, and dihybrid mean.
- **Haploid**: Organisms with one set of chromosomes (n).
- **Diploid**: Organisms with two sets of chromosomes (2n).

2. **Identify the Types of Crosses**:
- **Monohybrid Cross**: A genetic cross between parents that differ in only one trait. For example, crossing a plant with purple flowers with a plant with white flowers.
- **Dihybrid Cross**: A genetic cross between parents that differ in two traits. For example, crossing a plant that has purple flowers and round seeds with a plant that has white flowers and wrinkled seeds.

3. **Analyze the Question**:
- The question specifically asks for a cross involving parents that differ in only one trait.

4. **Choose the Correct Option**:
- Since the question specifies that the parents differ in only one trait, the correct answer is **monohybrid**.

5. **Final Answer**:
- Therefore, the answer to the question is **monohybrid**.