1 | The phenotype of pure-breeding varieties for a particular character is constant when crossed with members of the same variety. |
2 | One parental character disappears in the F1 generation when parents differ in the character for which each is pure-breeding (the recessive character is masked by the dominant character). |
3 | The outcome of a cross is independent of which parent provides the ovules and which the pollen. |
4 | The vanished (recessive) character reappears in about one-quarter of the F2 generation. |
5 | The two copies of a gene segregate to different gametes at meiosis and in equal numbers. |
6 | Gametes combine at random at fertilisation. |