A cross between a pure pea plant with yellow pod and round seeds with a pure pea plant with green pods and round seeds yields …….... green round plants in `F_1`

Options

A. `50%`
B. `20%`
C. `0%`
D. `100%`

Answer

To solve the problem of the cross between a pure pea plant with yellow pods and round seeds and a pure pea plant with green pods and round seeds, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Traits**:
- Yellow pods (recessive trait) = represented by "g"
- Green pods (dominant trait) = represented by "G"
- Round seeds (dominant trait) = represented by "R"
- Wrinkled seeds (recessive trait) = represented by "r"

2. **Determine the Genotypes of the Parent Plants**:
- The pure pea plant with yellow pods and round seeds will have the genotype: **ggRR** (homozygous recessive for pod color, homozygous dominant for seed shape).
- The pure pea plant with green pods and round seeds will have the genotype: **GGrr** (homozygous dominant for pod color, homozygous recessive for seed shape).

3. **Gamete Formation**:
- The yellow pod plant (ggRR) can only produce one type of gamete: **gR**.
- The green pod plant (GGrr) can only produce one type of gamete: **Gr**.

4. **F1 Generation Cross**:
- When we cross these two gametes, we can set up the following Punnett square:
- Gametes from yellow pod plant: gR
- Gametes from green pod plant: Gr

- The resulting F1 generation will have the genotype: **GgRr**.

5. **Phenotype of the F1 Generation**:
- The genotype GgRr indicates that the plants will have:
- Green pods (because G is dominant over g)
- Round seeds (because R is dominant over r)

6. **Conclusion**:
- Therefore, all plants in the F1 generation will have green pods and round seeds.

### Final Answer:
The answer is **D: 100%** green round plants in the F1 generation.

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