Question

In Mirabilis plant, tallness is completely dominant over dwarfness, while red flower exhibit incomplete dominance over white flower. If tall and pink flow- ered plant, on selfing shows 1:2:1 phenotypic ratio then what would be genotype of the plant (1) TURK (2) TTRRE (3) TERR (4) TTRT ​

Answer 1

Answer:

A tall plant with red flowers(TTRR) is crossed to dwarf plant with white flowers(ttrr). In the F1 generation, tall plant with pink flowers are formed(TtRR). When F1 plant is self pollinated, in the F2 generation 3 Tall plants with red flowers, 6 tall plants with pink flowers, 3 tall plants with white flowers, 1 dwarf plant with red flowers, 2 dwarf plants with pink flowers, 1 dwarf plant with white flowers are formed.

Answer 2

Answer:

Mirabilis jalapa has two types of pure breeding plants, red flowers, and white flowers. The phenotype of red flowers is considered to be as “RR” whereas the phenotype of the white flower as “rr”.When they are crossed, produce the first filial generation and all flowers possess pink color which shows blending inheritance. This clearly indicates that neither red flower nor white flower condition is dominant but when F1 generation crossed with F1 generation(on selfing them), the Second filial generation i.e. F2 generation plants show red flower, pink flower, and white flower condition in the ratio 1:2:1 i.e. RR:2Rr:rr.

- This clearly indicates the phenomenon of incomplete dominance.

So, the correct answer is, ”1:2:1”.

I guess this is the answer sorry if it is wrong