Genetics

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A homozygous pea plant with round peas and yellow cotyledons was crossed to a wrinkled, green plant. The F1 was selfed and produced:
193 round, yellow
69 round, green
64 wrinkled, yellow
26 wrinkled, green
a) propose hypothesis that allows you to calculate expected values based on Mendel's laws.
b) perform a chi-square test to determine if the data agrees with your model

I just got into this genetics class and already don't know what's going on. Please help? Thank You

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