From the above analysis, it can be seen that the genotype and ratio of F2 is AA:Aa:aa=1:2:1. Remove the short stems. Among the remaining plants, AA accounts for 13 and Aa accounts for 23, then A’s The gene frequency is 23, and the gene frequency of a accounts for 13. Let the high-stem corns in F2 pollinate each other. The proportion of AA in the offspring is 23×23=49, the proportion of Aa is 2×23×13=49, and the proportion of aa is 13×13=19. Therefore, the proportion of high-stem corn in the offspring and The ratio of dwarf corn is 8:1.

So choose: A.