The two genotypes above are dominant and recessive.
In the punnet square the genotypes are GG,Gg,gg, so the possibilites of yellow flowers are 1 and then there would 3 green flowers.
The outcome of homozygous ones would be 2 because there is GG, and gg.
The outcome of heterozygous ones would be 2 because there would be Gg.
Offspring that result from sexual reproduction will have more diverse characteristic because they have genes from the male and the female instaedof asexual where it is just one and the charaterictics would be alike.