Apea plant is heterozygous (aa) for seed color and heterozygous (bb) for seed shape. according to mendel's principle of independent assortment: (select all that apply.) each gamete will contain either a seed-color allele or a seed-shape allele, but not both. a gamete that contains dominant allele for seed color must also contain the dominant allele for seed shape. a gamete that contains dominant allele for seed color must also contain the recessive allele for seed shape. a gamete that contains the dominant allele for seed color is equally likely to contain the dominant or the recessive allele for seed shape. possible gamete genotypes are ab or ab; each is equally likely to occur.