Two pink coloured flower on corssing resulted in 1 red,2 pink and 1 white flower progeny. The nature of the cross will be

Options

A. double fertilisation
B. self pollination
C. cross ferstilisation
D. no fertilisation

Explanation

To determine the nature of the cross between two pink-colored flowers that resulted in 1 red, 2 pink, and 1 white flower progeny, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Color Inheritance**:
- The colors of the flowers suggest a genetic inheritance pattern. Let's denote the alleles:
- R = Red (dominant)
- P = Pink (incomplete dominance)
- W = White (recessive)

2. **Analyze the Progeny Ratio**:
- The progeny ratio given is 1 red: 2 pink: 1 white. This ratio is characteristic of a typical Mendelian dihybrid cross involving incomplete dominance.

3. **Determine Parental Genotypes**:
- Since the offspring include red, pink, and white flowers, we can infer the genotypes of the parent flowers:
- The pink flowers could be heterozygous (Rr) or homozygous (PP). However, since we see a red and a white flower in the offspring, the most likely scenario is that both parents are heterozygous (Rr).

4. **Set Up the Punnett Square**:
- To visualize the cross, we can set up a Punnett square:
- Parent 1: Rr (Pink)
- Parent 2: Rr (Pink)

| | R | r |
|-----|----|----|
| R | RR | Rr |
| r | Rr | rr |

- From the Punnett square, we can see:
- 1 RR (Red)
- 2 Rr (Pink)
- 1 rr (White)

5. **Conclusion**:
- The nature of the cross that produced these progeny is **cross-fertilization** between two pink-colored flowers (both heterozygous for the flower color trait).

### Final Answer:
The nature of the cross is **cross-fertilization**.

---