If a pure tall pea plant is crossed with a pure dwarf plant, then in the first generation only tall plants appear.
(a) What happens to the traits of the dwarf plant ?
(b) In the second generation, the dwarf trait reappears. Why ?
(a) In presence of the tall trait, the dwarf trait cannot express itself in the first generation.
(b) In the second generation, however, 25% of the plants reappear as dwarf is homozygous condition (tt).
This indicates that both tallness and dwarfness traits were inherited in $F_{1}$ plants but only tallness trait being the dominant trait could express and dwarf trait being could not recessive.