Question

If a pure tall pea plant is crossed with a pure dwarf plant, then in the first generation only tall plant appears. 

(a) What happens to the traits of the dwarf plant?

(b) In the second generation, the dwarf trait reappears? Why?

Answer 1

(a) The tall plant (dominant) mask the expression of the dwarf plant. 

(b) When F₁ hybrids are self crossed, the two entities separate and then unite independently forming tall and dwarf plant.