Please explain this to me?

That is our lesson too in Biology.. When doing the Punette's square first you should write the gametes and multiply it by each other.. Then when doing the genotype (it means the letters you got) you should write all the letters u've got.. It is a little different in genotypic ratio.. When asked for it you should write how many same answers u've got.. then the phenotype is about its kind or type.. for eample D- cross-eyed... Then cross-eyed is the phenotype and D is the genotype