Answer and Explanation:
Here is the given information:
Green peas are dominant, so we will put them as capital G.
Yellow peas are recessive (meaning they don't show if there is a dominant allele - trait), so we will pit them as lowercase G.
A Green Heterozygous (different, in this case, has both G and g, or Gg) pea plant.
A Yellow pea plant (will have both lowercase g, or gg).
To find the phenotypic percentages, we make a chart and solve.