How did mendel explain that it is possible that a trait is not heritage but not expressed in organism?
Answers
I think you meant: How did Mendel explain that it is possible that a trait is inherited but not expressed in organism?
Ans
Mendel took a Tall Pea plant (TT) and a short pea plant (tt). He crossbred these 2 plants and found that all plants in F1 progeny were tall (Tt). But when he crossbred plants in F1 progeny together, he found that 25% of F2 progeny were short. This meant that the dwarfness trait (t) was present in the F1 progeny but was not expressed due to presence of the dominant trait (T).
In Mendel’s experiment, when pure tall pea plants were crossed with pure dwarf pea plants, only tall pea plants were obtained in F1 generation.
On selfing the pea plants of F1 generation both tall and dwarf pea plants were obtained in F2 generation.
Reappearance of the dwarf pea plants in F2 generation proves that the dwarf trait was inherited but not expressed in F1 generation