Question : In one of his experiments with pea plants Mendel observed that when a pure tall pea plant is crossed with a pure dwarf pea plant, in the first generation, F_1 only tall plants appear. (a) What happens to the traits of the dwarf plants in this case? (b) When the F_1 generation plants were self-fertilised, he observed that in the plants of second generation, F_2 both tall plants and dwarf plants were present. Why it happened? Explain briefly.

Question : In one of his experiments with pea plants Mendel observed t

1.	Question : In one of his experiments with pea plants Mendel observed that when a pure tall pea plant is crossed with a pure dwarf pea plant, in the first generation, F_1 only tall plants appear. (a) What happens to the traits of the dwarf plants in this case? (b) When the F_1 generation plants were self-fertilised, he observed that in the plants of second generation, F_2 both tall plants and dwarf plants were present. Why it happened? Explain briefly.
Answer» Solution :(a) The dwarf traits of the PLANTS is not expressed in the PRESENCE of the DOMINANT tall trait. (B) In the `F_2` generation, both the tall and dwarf traits are PRESENT in the ratio of 3:1. This showed that the traits for tallness and dwarfness are present in the `F_1` generation, but the dwarfness, being the recessive trait does not express itself in the presence of tallness, the dominant trait.