Read the following statements and choose incorrect statement : (According to Mendel experiment)

Options

A. Mendel crossed tall and dwarf pea plant to study the inheritance of one gene known as Monohybrid cross.
B. In monohybrid cross, `F_(1)` progeny plants were similar to one of its parents
C. In `F_(2)` generation of monohybrid cross, only one of the parental trait was expressed
D. In `F_(2)` generation of monohybrid cross both the traits were expressed in the proportion 3:1.

Answer

To determine the incorrect statement according to Mendel's experiments, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Read the First Statement**:
- "Mendel cross tall and dwarf pea plant to study the inheritance of one gene known as monohybrid cross."
- **Analysis**: This statement is true. Mendel's monohybrid cross involved crossing a tall pea plant (dominant trait) with a dwarf pea plant (recessive trait) to study the inheritance of one trait.

2. **Read the Second Statement**:
- "In monohybrid cross F1 progeny plants were similar to one of its parents."
- **Analysis**: This statement is also true. In the F1 generation, all offspring were tall (the dominant trait), resembling the tall parent.

3. **Read the Third Statement**:
- "In F2 generation of monohybrid cross, only one of the parental trait was expressed."
- **Analysis**: This statement is incorrect. In the F2 generation, both traits (tall and dwarf) are expressed. The F2 generation results from self-crossing the F1 generation, leading to a phenotypic ratio of 3 tall plants to 1 dwarf plant.

4. **Read the Fourth Statement**:
- "In F2 generation of monohybrid cross both the traits were expressed in the proportion of 3:1."
- **Analysis**: This statement is true. The F2 generation exhibits a phenotypic ratio of 3 tall plants to 1 dwarf plant.

### Conclusion:
The incorrect statement is the third one: "In F2 generation of monohybrid cross, only one of the parental trait was expressed."

### Final Answer:
- The incorrect statement according to Mendel's experiment is: **"In F2 generation of monohybrid cross, only one of the parental trait was expressed."**

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