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Why in a test...

Question

Why in a test cross, did Mendel cross a tall pea plant with a dwarf pea plant only?

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Solution

A cross is made between an F₁ heterozygous hybrid with homozygous recessive parent is called Test cross. It is used to determine, whether F1 individual is either homozygous or heterozygous.

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

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?

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Write the possible genotype Mendel got when he crossed F1 tall pea plant with a drawf pea plant?

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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