how do Mendel experiment shows that traits may be dominant or recessive
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When Mendel did crossed pure tall plants with pure dwarf pea plants, then he found that only tall plants were produced in F1 generation. Dwarf plants were not obtained in F1 generation. But when F1 tall plants were self-pollinated,Mendel got both tall and dwarf plants in 3:1 ratio. So, Mendel called this tall character as DOMINANT and dwarf character as RECESSIVE.
When Mendel did crossed pure tall plants with pure dwarf pea plants, then he found that only tall plants were produced in F1 generation. Dwarf plants were not obtained in F1 generation. But when F1 tall plants were self-pollinated,Mendel got both tall and dwarf plants in 3:1 ratio. So, Mendel called this tall character as DOMINANT and dwarf character as RECESSIVE.
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The trait which appears in all the members of F1 generation and also in 75% numbers of F2generation obtained by self fertilization of F1 generation is dominant character.
The trait which does not appear in F generation but after self-fertilization of F1 generation, reappears in 25% of F2 generation is known as recessive.
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