Question

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?

Explanation:

Step1: Determine possible gametes

The first plant with alleles Gg can produce gametes G and g. The second plant with alleles gg can produce only g gametes.

Step2: Use Punnett - square logic

When we cross them, the possible allele combinations of the offspring are Gg and gg. Since the offspring have green pods and G is the dominant allele for green color, the allele combination must be Gg.

Answer:

Gg