Which of the following were not observed in studies done on certain dwarf strains of plants?

Applications of extracts of normal strains promoted growth of dwarf strains

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Dwarf strains grew normally if additional fertilizer was applied

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Application of gibberellin A1 promoted growth of dwarf strain

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Gibberellin caused little longitudinal growth of dwarf strains

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Solution

The correct option is B Dwarf strains grew normally if additional fertilizer was applied
The dwarf strains are genetically unable to produce gibberellin. So, additional fertilizers would have no effect.

Gibberellins are produced in greater mass when the plant is exposed to cold temperatures. They stimulate cell elongation, breaking and budding, seedless fruits, and seed germination. Gibberellins cause seed germination by breaking the seed's dormancy and acting as a chemical messenger. Gibberellins have striking growth-promoting effects. They speed the elongation of dwarf varieties to normal sizes and promote flowering, stem and root elongation, and growth of fruit.

Gibberellic acid applied to dwarfs accelerates not exclusively the longitudinal growth of plants but also promotes their transition to the next developmental phases.

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Similar questions

In one of his experiments with pea plants, Mendel observed that when a pure tall pea plant is crossed with a pure dwarf pea plant, in the first generation

F_{1}

only tall plants appear.

(i)When the

F_{1}

generation plants were self-fertilized, he observed that in the plants of second-generation

F_{2}

both tall plants and dwarf plants were present. Why did it happen? Explain briefly.
(ii)What happens to the traits of the dwarf plants in this case?

Q. Pure tall plants are crossed with pure dwarf plants. In the F

_{1}

generation all plants were tall. These tall plants of F

_{1}

generation were selfed and the ratio of tall to dwarf plants obtained was 3: 1. The phenomenon observed is

Mendel crossed true breeding tall plant with true breeding dwarf plant and raised F2 generation from F1hybrid. Mendel observed that out of the 1064 F2 prophecies, 787 were tall

And 277 were dwarf. how many plants were expected to be in heterozygous condition?

277

787

532

510

Q. Which amongst the following were the traits that Mendel observed in his experiments on pea plants?

Which of the following space probes were launched to the study about the dwarf planet Pluto?

Code:

1, 2 and 3
1 and 2 only
1 only
1 and 3 only

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