Ahomozygous black pig mated with another homozygous black pig. what is the genotype of parent's?

Which represents the cross between parent plants if one is heterozygous for yellow-colored pods and the other is homozygous for green-colored pods? yy  ´    ´    ´    ´  yy

2. which is the last step in the scientific method?

What type of plant is good for a bioassay and where can i buy it? i only have a month.