When a green full pod producing pea plant ils crossed to an yellow constricted pod producing pea plant in the progen gren fullpod and green constricted pod producing pea plants only are formed in 1:1 ratio. The genotype of tested individual is

Options

A. GGFF
B. GfFf
C. GGFf
D. GgFf

Answer

To solve the problem, we need to analyze the genetic cross between two pea plants with different pod characteristics. Here’s a step-by-step breakdown:

### Step 1: Identify the Traits and Their Alleles
- **Green Full Pod**: This trait is dominant. We can represent it with the alleles **G** (for green) and **F** (for full).
- **Yellow Constricted Pod**: This trait is recessive. We can represent it with the alleles **g** (for yellow) and **f** (for constricted).

### Step 2: Determine the Genotypes of the Parent Plants
- The **green full pod** plant can be either homozygous dominant (GGFF) or heterozygous (GgFf).
- The **yellow constricted pod** plant must be homozygous recessive (ggff).

### Step 3: Set Up the Cross
- We will cross the green full pod plant (let’s assume it is heterozygous for both traits for this example) with the yellow constricted pod plant:
- Green Full Pod: **GgFf**
- Yellow Constricted Pod: **ggff**

### Step 4: Determine the Possible Gametes
- The gametes from the green full pod plant (GgFf) can be:
- GF
- Gf
- gF
- gf
- The gametes from the yellow constricted pod plant (ggff) can only be:
- gf

### Step 5: Create a Punnett Square
- When we combine these gametes, we can create a Punnett square to see the possible offspring:

| | gf |
|---------|---------|
| **GF** | GgFf |
| **Gf** | Ggff |
| **gF** | ggFf |
| **gf** | ggff |

### Step 6: Analyze the Offspring
- The offspring from this cross will be:
- GgFf (Green Full Pod)
- Ggff (Green Constricted Pod)
- ggFf (Yellow Full Pod)
- ggff (Yellow Constricted Pod)

### Step 7: Determine the Ratio
- According to the question, the progeny produced a 1:1 ratio of green full pods to green constricted pods. This indicates that the tested individual must be heterozygous for the pod shape trait (Ff) and homozygous for the pod color trait (GG).

### Conclusion: Genotype of the Tested Individual
- Therefore, the genotype of the tested individual is **GgFf**.

### Final Answer
- The genotype of the tested individual is **GgFf**.

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