A plant contains the alleles Gg for green pod color. It is crossed with a plant that has the alleles gg for yellow pod color. The offspring have green pods. What is the allele combination? Explain how the alleles were passed from parents to offspring.

Make a Punnett square. When you cross the Gg plant with the gg plant, you get two Ggs (green) and two ggs (yellow). The allele combination is Gg (it's heterozygous for the dominant and recessive allele).

Each parent gives one version (allele) of the gene when the plant seeds and pollens are crossed.