How many given characters of garden pea express when the factor are homozygous only ?
Terminal flower, Green seed, Yellow pod, Constricted pod, Violet petals, Dwarf stem

Options

A. four
B. Five
C. Six
D. One

Answer

To determine how many characters of garden pea express when the factors are homozygous only, we need to analyze each character provided in the question.

### Step-by-Step Solution:

1. **Understand Dominance and Recessiveness**:
- Dominant traits can be expressed in both homozygous (AA) and heterozygous (Aa) conditions.
- Recessive traits can only be expressed in homozygous conditions (aa).

2. **List the Characters**:
- Terminal flower
- Green seed
- Yellow pod
- Constricted pod
- Violet petals
- Dwarf stem

3. **Analyze Each Character**:
- **Terminal Flower**: This is a recessive trait. It will express only in homozygous condition (tt). **(Expresses)**
- **Green Seed**: This is also a recessive trait. It will express only in homozygous condition (gg). **(Expresses)**
- **Yellow Pod**: This is a recessive trait. It will express only in homozygous condition (yy). **(Expresses)**
- **Constricted Pod**: This is a recessive trait. It will express only in homozygous condition (cc). **(Expresses)**
- **Violet Petals**: This is a dominant trait. It can express in both homozygous (VV) and heterozygous (Vv) conditions. **(Does not express only in homozygous)**
- **Dwarf Stem**: This is a recessive trait. It will express only in homozygous condition (dd). **(Expresses)**

4. **Count the Characters that Express in Homozygous Condition**:
- Characters that express only in homozygous condition:
- Terminal flower
- Green seed
- Yellow pod
- Constricted pod
- Dwarf stem
- Total: 5 characters

5. **Conclusion**:
- The total number of characters that express when the factors are homozygous only is **5**.

### Final Answer:
**5 characters express when the factors are homozygous only.**

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