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Discussion of probability and explanation of dihybrid cross

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Understanding Inheritance and probability

If we perform a F1 cross of the corn we can predict the probabilities of obtaining a particular outcome. For example, we can ask; what is the probability of getting a purple smooth corn seed from a dihybrid F1 cross of PpSs?

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Solution Summary

The solution discusses a specific dihybrid cross problem (see below) and work out the probabilities for the different outcomes.

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See attached file for solution. The need for a Punnett square meant the solution could not be done in plain text (no tables).

If we perform a F1 cross of the corn we can predict the probabilities of obtaining a particular outcome. For example, we can ask; what is the probability of getting a purple smooth corn seed from a dihybrid F1 cross of PpSs?

Question is: is purple dominant or recessive? So does pp = purple, or does PP? Same thing with smooth phenotype: is ss = smooth, or does SS?
I will assume that purple and smooth are the dominant forms of the traits.

Only possible gametes (sex cells) that ...

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