According to Mendel’s view of dominant trait, the characteristics or the trait of an organism is determined by the internal factors, these factors always occur in pairs. Out of the two traits, only one of them expresses itself and is known as dominant. The other one which is not expressed is known as Recessive trait.
It can be understood with the help of any example such as when true breed dwarf plants, the plants appeared in F1 generation are found to be tall but in F2 generation, the plants were dwarf. It can be shown as follows:
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