A pure breeding pea plant that produces yellow, round peas is crossed with a plant that only produces green, wrinkled peas. The peas from this cross are all yellow and round. Based on phenotypic ratios and ignoring statistical variation, how many of these F1 yellow, round peas would you need to plant to get 60 green and round peas?
Group of answer choices
600
There is not enough information to determine dominance
120
60
240
80
160
320