Mendel crossed tall and dwarf pea plants and obtained all tall plants in the F, generation and tall and dwarf plants in the ratio of 3:1 in the F2 generation. From these results he deduced the:
A. Law of dominance
B. law of Independent assortment
C. Law of segregation
D. None of the above

Options

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

Answer

To solve the question regarding Mendel's experiments with pea plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Cross**:
- Mendel crossed tall (T) and dwarf (t) pea plants. The tall trait is dominant over the dwarf trait.

2. **F1 Generation**:
- In the F1 generation, all offspring were tall (Tt). This indicates that the tall trait is dominant since all plants showed the tall phenotype.

3. **F2 Generation**:
- When Mendel allowed the F1 plants to self-fertilize, the F2 generation exhibited both tall and dwarf plants in a ratio of 3:1. This means that out of four plants, three were tall and one was dwarf.

4. **Deducing the Law**:
- From the F2 generation results (3 tall: 1 dwarf), Mendel deduced that the alleles segregate during gamete formation. This means that each gamete carries only one allele for each trait.

5. **Conclusion**:
- The conclusion drawn from these observations is known as the **Law of Segregation**. This law states that during the formation of gametes, the two alleles for a trait separate from each other, so that each gamete carries only one allele for each trait.

### Final Answer:
The correct answer is **C. Law of segregation**.

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