Question

How do Mendel's experiments show that traits may be dominant or recessive?

Solution

Mendel conducted the experiments using Pisum sativum or pea plant.He selected homozygous tall (TT) and dwarf (tt) pea plants.He crossed the tall pea plant with the dwarf pea plant.It was observed that the  F$$_1$$ generation are all tall plants.Thus, it was concluded that the gene causing tallness is dominant while the gene causing dwarfness is recessive.The trait expressing itself in the hybrid is the dominant one. This experiment proves Mendel’s first law of inheritance.It states that when a pair of contrasting factors is brought in a hybrid, one factor inhibits the appearance of the other, one which inhibits is the dominant one and which is inhibited is recessive.Biology

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