Question

In a monohybrid cross between tall pea plants (TT) and short pea plants (tt) a scientist obtained only tall pea plants (Tt) in the F1 generation. However, on selfing the F1 generation pea plants, he obtained both tall and short plants in F2 generation. On the basis of above observations with other angiosperms also, can the scientist arrive at a law? If yes, explain the law. If not, give justification for your answer.

Answer 1

According to the law of dominance if a dominant character and a recessive character is cross breeded then in F1 generation only the dominant characters will reproduce whereas in F2 generation the dominant and recessive characters will produce in the ratio 3:1 respectively.

Answer 2

on the basis of the above observations, yes the scientist arrived at a law.This law is defined as law of dominance.

If a dominant character and recessive character is crossed between each other then the dominant character will reproduce in the F1 generation.

And in the F2 generation, the ratio of tall plants to the dwarf plants is 3:1