How did Mendel explain that it is possible that a trait is inherited but not expressed in an organism?
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He explained this with the concept of dominant and recessive genes.
When he bred pure tall (TT) and pure short (tt) pea plants, the F1 progeny showed all tall plants. However they had the genotype Tt. However the trait “shortness” did not express itself hence it was recessive while the tallness trait expressed itself hence it was dominant.
So it is possible that a gene is inherited but is not expressed if it is recessive.
When he bred pure tall (TT) and pure short (tt) pea plants, the F1 progeny showed all tall plants. However they had the genotype Tt. However the trait “shortness” did not express itself hence it was recessive while the tallness trait expressed itself hence it was dominant.
So it is possible that a gene is inherited but is not expressed if it is recessive.
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