F 1 generation is all heterozygous safflower peas, assuming that the genotype is Aa.

1:2: 1 separated from F2, some 1/2 is heterozygous Aa, the remaining 1/4 is aa, and 1/4 is AA, all of which are homozygous.

When F3 is generated, aa and Aa do not separate, only Aa separates, and the ratio of 1:2: 1 is formed again, and 1/4 is AA. （ 1/2× 1/2）

F4 and F5 and so on, F4 has 1/8 is Aa, F5 has116. The rest are aa and AA separated in half, so the AA with (1-116) ÷ 2 =15/32 is homozygous safflower.

In fact, the process of continuous selfing is to separate heterozygotes into two homozygotes in equal amounts.