Living Environment

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Which of the following is not a good reason why Pisum sativum makes an excellent subject for gentic study?

a.) Many varieties exist.
b.) They require cross-pollination.
c.) They grow quickly.
d.) They demonstrate complete dominance

Can somebody please help me? I am 11% sure it's not c or d. I'm stuck in between a & b.
Thanks for your help!!!

  • Living Environment -

    How did Mendel allow a single garden pea plant to reproduce with itself?

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