Answer:
D. Some GG some Gg some gg
Explanation:
To get an answer to that question, you need to make the punnet square. The punnet square is a diagram that allows you to see what the genotype of an offspring would be, generated by the genotype of two parents.
In the case of the question above, the matching of parent "Gg" with another parent Gg will be shown in the figure below. In this figure we can see that the result of the offspring is 25% of the individuals has the "GG" genotype, 50% has the "Gg" genotype and 25% has the "gg" genotype.
