pea plant hybrid question?

Question: In peas, yellow is dominant over green in seeds. With which of these is the best to cross a yellow-seeded pea plant to determine whether it is pure or hybrid? 1. A green-seeded plant 2. A hybrid yellow-seeded plant 3. A pure yellow-seeded plant 4. A hybrid yellow-seeded plant or a pure-yellow seeded plant. I think it's 1 green-seeded. If it comes out yellow then you know it's pure,. Why or why not?

Answer: you're right it's green. good job! this seems like homework, and this is a pretty important concept so i feel better teaching you to fish than giving you the fish. do two quick punnet squares of crossing a green plant to both hypothetical yellow plants: the homo- and heterozygote. ("gg vs. YY" & "gg vs. Yg"). does using the green plant as a crosser help you figure out what the yellow plant was? yes, because there should be a pretty good difference between the offspring. look at why the crosses are different, and there's your answer.

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