Question

how do mendal's experiment show that traits my be dominant or recessive?

Answer 1

(a) Mendel demonstrated that traits can be either dominant or recessive through his monohybrid cross. He crossed true-breeding tall (TT) and dwarf (tt) pea plants. ... They appeared tall only because the tall trait was dominant over the dwarf trait. This shows that traits may be dominant or recessive

Answer 2

traits appearing in F1 generation are dominant whereas traits that do not appear in F1 generation are recessive