Mendel experiments had a large sampling size.

Answer

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

1. **Understanding the Question**: The question asks whether Mendel's experiments had a large sampling size, which refers to the number of pea plants he studied.

2. **Mendel's Research**: Gregor Mendel conducted his experiments in the mid-19th century, specifically starting in 1865. He is known for his foundational work in genetics using pea plants.

3. **Sampling Size**: Mendel used a significant number of pea plants in his experiments. It is noted that he studied at least 30,000 plants or more. This large sample size is crucial for obtaining reliable and valid results.

4. **Importance of Large Sampling Size**: A large sampling size allows for more accurate observations of genetic variations and inheritance patterns. It helps in minimizing the effects of random chance and provides a clearer picture of genetic principles.

5. **Mendel's Laws**: Through his extensive research, Mendel formulated three key laws of inheritance:
- **Law of Dominance**: Dominant traits overpower recessive traits.
- **Law of Segregation**: Alleles segregate independently during gamete formation.
- **Law of Independent Assortment**: Genes for different traits assort independently of one another.

6. **Conclusion**: Since Mendel indeed used a large sampling size in his experiments, the statement that "Mendel's experiments had a large sampling size" is true.

**Final Answer**: True

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