Question

What happened when Mendel crossed two traits of a character in a pea plant?

Answer 1

Only dominant trait appeared in $F_1$.

For monohybrid cross, Mendel began with a pair of pea plants with two contrasting traits i.e., one tall and another dwarf. The cross-pollination of tall and dwarf plants resulted in tall plants. All the hybrid plants were tall. He called this as a first hybrid generation (F₁) and offspring were called Filial₁ or F₁ progeny. He conducted an experiment with all the seven contrasting pairs. He observed that the entire F₁progeny showed one pattern in their behavior i.e., they resembled either one of the parents. Another parent character was completely absent.