The genotype for yellow seeds would be YY or Yy, and the genotype for green seeds would be yy. These genotypes refer to the alleles (different forms of a gene) for seed color. In this example, Y represents the dominant allele for yellow seed color, and y represents the recessive allele for green seed color. When an organism has two copies of the dominant allele (YY), the phenotype (observable trait) will be yellow seeds. When an organism has one copy of the dominant allele and one copy of the recessive allele (Yy), the phenotype will also be yellow seeds. However, when an organism has two copies of the recessive allele (yy), the phenotype will be green seeds.