Select the correct statements regarding the cross between a pure tall pea plant and a pure short pea plant in…

Select the correct statements regarding the cross between a pure tall pea plant and a pure short pea plant in Mendelian experiments : I. For the same trait, two copies of genes are present in individuals that reproduce sexually. II. The tall plants of ${\text{F}}_1$ generation were exactly the same as the tall plants of the parent generation genetically. III. One-quarter of the plants of ${\text{F}}_2$ generation were short. IV. Traits like tallness and shortness both were inherited in the plants of ${\text{F}}_1$ generation.