In Mendelian dihybrid cross, when heterozygous Round Yellow are self crossed, Round Green offsprings are represented by the genotype

Options

A. RrYy,RrYY,RRYy
B. Rryy,Rryy,rryy
C. rrYy,rrYY
D. Rryy,RRyy

Explanation

To solve the question regarding the genotype of Round Green offspring from a Mendelian dihybrid cross involving heterozygous Round Yellow plants, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Traits and Their Alleles**:
- Round (R) is dominant over Wrinkled (r).
- Yellow (Y) is dominant over Green (y).
- Therefore, the genotypes for Round Yellow plants are RrYy (heterozygous).

2. **Set Up the Dihybrid Cross**:
- When two heterozygous Round Yellow plants (RrYy) are self-crossed, we can set up a Punnett square to determine the possible offspring genotypes.
- The gametes produced by each parent will be RY, Ry, rY, and ry.

3. **Create the Punnett Square**:
- The Punnett square will have the gametes of one parent on the top and the gametes of the other parent on the side:

```
RY Ry rY ry
---------------------------
RY | RRYY | RRYy | RrYY | RrYy |
---------------------------
Ry | RRYy | RRyy | RrYy | Rryy |
---------------------------
rY | RrYY | RrYy | rrYY | rrYy |
---------------------------
ry | RrYy | Rryy | rrYy | rryy |
---------------------------
```

4. **Identify the Desired Genotype**:
- We are looking for Round Green offspring.
- Round phenotype can be represented by either RRYY, RRYy, RrYY, or RrYy.
- Green phenotype can only be represented by the genotype with two recessive alleles for yellow, which is 'yy'.

5. **Determine the Round Green Genotype**:
- The only combination that gives Round Green offspring is Rryy (where R is for Round and yy is for Green).
- Therefore, the Round Green offspring will have the genotype Rryy.

6. **Conclusion**:
- The genotype for Round Green offspring from the self-cross of heterozygous Round Yellow plants is Rryy.

### Final Answer:
The genotype of Round Green offspring is **Rryy**.