in an extremely short sentence summarize this
"In the F1 generation, all individuals are heterozygous (Rr) because red (RR) is dominant over white (rr).
When the F1 individuals are crossed with each other, the following genotypic ratio can be expected in the F2 generation:
1 RR : 2 Rr : 1 rr
This ratio represents the distribution of possible genotypes in the offspring of two heterozygous individuals."