On crossing two similar hybrids, the percentage of recessive is

Options

A. 0.5
B. 0.75
C. 0.25
D. 1

Answer

To solve the problem of finding the percentage of recessive traits when crossing two similar hybrids, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Genotype of the Hybrids**:
- Let's denote the dominant allele for red flower color as "R" and the recessive allele for white flower color as "r". Since we are dealing with hybrids, the genotype of each hybrid can be represented as "Rr".

2. **Set Up the Cross**:
- We are crossing two similar hybrids (Rr x Rr). This can be visualized using a Punnett square.

3. **Create a Punnett Square**:
- The Punnett square will have the gametes from each parent along the top and side:
```
R r
__________
R | RR | Rr |
|______|_____|
r | Rr | rr |
|______|_____|
```

4. **Determine the Offspring Genotypes**:
- From the Punnett square, we can see the possible genotypes of the offspring:
- 1 RR (homozygous dominant)
- 2 Rr (heterozygous)
- 1 rr (homozygous recessive)

5. **Count the Recessive Offspring**:
- Out of the four possible genotypes, only 1 is homozygous recessive (rr).

6. **Calculate the Percentage of Recessive Traits**:
- To find the percentage of recessive traits, we take the number of recessive offspring (1) and divide it by the total number of offspring (4):
\[ \text{Percentage of recessive} = \frac{1}{4} = 0.25 \text{ or } 25\% \]

7. **Conclusion**:
- Therefore, the percentage of recessive traits when crossing two similar hybrids is 0.25.

### Final Answer:
The percentage of recessive traits is **0.25** (or 25%).

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