Two traits that is starch Synthesis and shape of seed in pea is

Options

A. Two effects of same gene
B. Two different effects of group of genes
C. case of epistasis
D. Two different effects of group of genes

Answer

To solve the question regarding the traits of starch synthesis and seed shape in pea plants, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Traits**: The traits in question are starch synthesis and seed shape in pea plants.

2. **Understand the Genetic Basis**: Both traits are controlled by a single gene pair, denoted as B (dominant) and b (recessive).

3. **Analyze the Seed Shape**:
- In the homozygous dominant condition (BB), the seed shape is round.
- In the heterozygous condition (Bb), the seed shape is also round because the dominant allele (B) masks the effect of the recessive allele (b).
- In the homozygous recessive condition (bb), the seed shape is wrinkled.

4. **Analyze Starch Synthesis**:
- In the homozygous dominant condition (BB), starch synthesis is high.
- In the heterozygous condition (Bb), starch synthesis is medium due to incomplete dominance, meaning the dominant allele does not fully express its trait.
- In the homozygous recessive condition (bb), starch synthesis is low.

5. **Define Pleiotropy**: Pleiotropy occurs when one gene influences multiple phenotypic traits. In this case, the gene B affects both seed shape and starch synthesis.

6. **Evaluate the Options**:
- **Option A**: Two effects of the same gene (Correct: This describes pleiotropy).
- **Option B**: Two different effects of a group of genes (Incorrect: Both traits are controlled by one gene).
- **Option C**: Case of epistasis (Incorrect: No gene is masking another).
- **Option D**: Two different effects of a group of genes (Incorrect: Same reasoning as B).

7. **Conclusion**: Since starch synthesis and seed shape are influenced by the same gene, the correct answer is **Option A**: Two effects of the same gene.