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प्रश्न
If a red flowered Mirabilis jalapa plant is crossed with a white flowered plant, what will be the phenotypic ratio in F2 generation? Show it by a chart.
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उत्तर
A cross between red flowered and white flowered Mirabilis jalopa plant:
F2 Generation
|
R | r |
|
||
| R | RR (Red) |
Rr (Pink) |
| r | Rr (Pink) |
rr (White) |
→
↓Phenotypic ratio ⇒ 1 : 2 : 1 (1Red : 2 Pink : 1 White)
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संबंधित प्रश्न
In cattle, when red one is crossed with a white, an intermediate roan coloured offspring is formed in the F1 generation. When selfing of the F1 generation was carried, the result obtained was ______
______ refers to a phenomenon in which heterozygotes have features of both the homozygotes, that is, an allele is neither dominant nor recessive to the other.
Assertion (A): In Mirabilis jalapa (4 o'clock plant), a cross between Red flowered plant and White-flowered plant (both homozygous) produced Pink flowered plant in F1 generation.
Reason (R): In this plant, flower colour is controlled by pleiotropic genes
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Which of the parents with the following blood groups CANNOT have a child with blood group A?
Define – Incomplete dominance.
______ occurs when heterozygotes express both homozygous phenotypes equally.
Give a cross for incomplete dominance using a suitable example.
Give a cross of co-dominance using a suitable example.
