A recessive trait in garden pea is

Options

A. (a) wrinkled seeds
B. (b) tall stem
C. (c) round seeds
D. (d) coloured seed coat

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks for a recessive trait in garden pea (Pisum sativum) as studied by Gregor Mendel.

2. **Mendel's Study**: Mendel conducted experiments on seven contrasting traits in garden peas, which included:
- Seed shape: Round vs. Wrinkled
- Seed color: Yellow vs. Green
- Pod shape: Inflated vs. Constricted
- Pod color: Green vs. Yellow
- Seed coat color: Colored vs. Colorless
- Plant height: Tall vs. Dwarf
- Flower position: Axial vs. Terminal

3. **Law of Dominance**: Mendel proposed the law of dominance, which states that in a heterozygous condition (where one allele is dominant and the other is recessive), the dominant allele will mask the effect of the recessive allele. The recessive trait only expresses itself when both alleles are recessive.

4. **Identifying Recessive Traits**: From Mendel's studies, we can identify which traits are recessive:
- Wrinkled seeds (recessive)
- Green seeds (recessive)
- Constricted pods (recessive)
- Yellow pods (recessive)
- Dwarf plants (recessive)
- Terminal flowers (recessive)
- Colorless seed coat (recessive)

5. **Evaluating the Options**:
- A) Wrinkled seeds: This is a recessive trait.
- B) Tall stem: This is a dominant trait.
- C) Round seeds: This is a dominant trait.
- D) Colored seed coat: This is a dominant trait.

6. **Conclusion**: The only option that represents a recessive trait in garden pea is option A, which is wrinkled seeds.

**Final Answer**: A) Wrinkled seeds.

---