The character which can express only in homozygous condition in case of garden pea is-
(A) Constricted pod (B) Green seed colour
(C) Axial flower (D) Yellow pod

Options

A. A, B & D
B. A, C & D
C. B, C & D
D. A, B & C

Answer

To solve the question regarding which character can express only in homozygous condition in garden pea, we will analyze each option based on Mendelian genetics principles.

### Step-by-Step Solution:

1. **Understanding Homozygous and Heterozygous Conditions**:
- Homozygous condition refers to having two identical alleles for a trait (e.g., AA or aa).
- Heterozygous condition refers to having two different alleles for a trait (e.g., Aa).

2. **Identifying Dominant and Recessive Traits**:
- Dominant traits can be expressed in both homozygous (AA) and heterozygous (Aa) conditions.
- Recessive traits can only be expressed in the homozygous condition (aa).

3. **Analyzing Each Option**:
- **(A) Constricted pod**: This trait is recessive and can only be expressed in the homozygous condition (cc). The dominant trait is the swollen pod (C).
- **(B) Green seed color**: This trait is also recessive and can only be expressed in the homozygous condition (gg). The dominant trait is yellow seed color (G).
- **(C) Axial flower**: This trait is dominant and can be expressed in both homozygous (AA) and heterozygous (Aa) conditions. The recessive trait is terminal flower (aa).
- **(D) Yellow pod**: This trait is recessive and can only be expressed in the homozygous condition (yy). The dominant trait is green pod (Y).

4. **Conclusion**:
- The characters that can express only in homozygous condition are constricted pod (A), green seed color (B), and yellow pod (D). However, the question asks for the character that can express only in homozygous condition, which is specifically constricted pod (A) since it is the first option listed.

### Final Answer:
The character which can express only in homozygous condition in case of garden pea is **(A) Constricted pod**.