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?

The green-pod parent has genotype Gg, so it can pass on either G or g. The yellow-pod parent is gg and can pass on only g. Since the offspring have green pods, they must have received G from the first parent and g from the second, giving genotype Gg, choice B.

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