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In order to obtain the F(1)-generation M...

In order to obtain the `F_(1)`-generation Mendel pollinated a pure-breeding tall plant with a pure-breeding dwarf plant. But for getting the `F_(2)`-generatin, he simply self-pollinated the tall `F_(1)` plants. Why?

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Characters segregate during gamete formation. Pure-breeding parents guve ruse to `F_(1)` with hetoeozyous conditions. Only self-pollination of heterzygotes can result in all possible recombination of characters in progeny as mating is random.
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