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, we need to analyze the genetic cross between two pure pea plants based on the traits provided: pod color and seed shape.

### Step-by-Step Solution:

1. **Identify the Traits and Their Dominance**:
- Pod Color:
- Green pods (dominant) = represented by "G"
- Yellow pods (recessive) = represented by "g"
- Seed Shape:
- Round seeds (dominant) = represented by "R"
- Wrinkled seeds (recessive) = represented by "r"

2. **Determine the Genotypes of the Parents**:
- Parent 1 (pure yellow pods and round seeds):
- Genotype = "ggRR" (homozygous recessive for pod color and homozygous dominant for seed shape)
- Parent 2 (pure green pods and round seeds):
- Genotype = "GG RR" (homozygous dominant for pod color and homozygous dominant for seed shape)

3. **Gamete Formation**:
- Parent 1 can produce gametes: "gR"
- Parent 2 can produce gametes: "GR"

4. **F1 Generation Cross**:
- When we cross the gametes from both parents:
- Offspring genotype = "GgRR"
- This means all offspring will have:
- Green pods (because "G" is dominant)
- Round seeds (because "R" is dominant)

5. **Phenotypic Ratio in F1 Generation**:
- Since all offspring have the genotype "GgRR", they will all express the dominant traits:
- All will have green pods and round seeds.

6. **Conclusion**:
- Therefore, in the F1 generation, 100% of the plants will have green pods and round seeds.

### Final Answer:
The answer is 100%.

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