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Mendel's Experiments

When Mendel c...

Question

When Mendel crossed a pure tall pea plant with a pure dwarf pea plant, _______ was obtained in the F1 generation.

A

TT

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B

tt

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C

Tt

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D

PT

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Solution

The correct option is C Tt
When Mendel crossed one pure tall (TT) and one pure dwarf (tt) pea plant, the combination of the offspring produced was Tt. Since, T allele is dominant over t allele, the plant produced was tall. Tt refers to as hybrid because it has the alleles of both the parents.

Parents : (Tall) TT × (Dwarf) tt

Offspring/ F1 generation: (Tall) Tt

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Q. In one of the experiments with pea plants, Mendel observed that when a homozygous tall pea plant (TT) is crossed with a homozygous dwarf pea plant (tt), in the first generation, only tall plants appear. What happens to the traits of the dwarf plant in this case?

A cross between a pure tall and pure dwarf pea plant resulted in production of all tall plants, because

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.

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?

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