In incomplete dominance, ratio of Red : Pink : White is :

Options

A. `1:2:1`
B. `1:1:2`
C. `1:2:2`
D. `2:2:1`

Answer

To solve the question regarding the ratio of Red : Pink : White in incomplete dominance, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Incomplete Dominance**:
- In incomplete dominance, the phenotype of the heterozygote is an intermediate of the phenotypes of the two homozygotes. This means that when a red flower (RR) is crossed with a white flower (rr), the resulting offspring (Rr) will have a pink phenotype.

2. **Setting Up the Cross**:
- Let's denote the red flower as "RR" (homozygous dominant) and the white flower as "rr" (homozygous recessive).
- When we perform a cross between these two, we can use a Punnett square to visualize the possible genotypes of the offspring.

3. **Punnett Square Analysis**:
- The Punnett square for the cross RR (red) x rr (white) would look like this:
```
R | R
-----------------
r | Rr | Rr
-----------------
r | Rr | Rr
```
- From this cross, all offspring will be Rr, which are pink.

4. **Considering the Next Generation**:
- If we now cross two pink flowers (Rr x Rr), we can set up another Punnett square:
```
R | r
-----------------
R | RR | Rr
-----------------
r | Rr | rr
```
- The genotypes produced from this cross will be:
- 1 RR (red)
- 2 Rr (pink)
- 1 rr (white)

5. **Calculating the Ratios**:
- The phenotypic ratio from this cross is:
- Red (RR) : Pink (Rr) : White (rr) = 1 : 2 : 1

6. **Conclusion**:
- Therefore, the ratio of Red : Pink : White in incomplete dominance is 1 : 2 : 1.

### Final Answer:
The ratio of Red : Pink : White in incomplete dominance is **1 : 2 : 1**.