Introduction to Mendelian Genetics
Crossing the F1 Generation: Male Contribution
We'll now cross two heterozygotes (the F1) that resulted from our original parent cross (P), TT x tt. First, write the two possible alleles that the male contributes to the Punnet square above. Then, write the the two possible alleles that the female can contribute on the left-hand side of the Punnet square. Write the alleles that the male contributes to the offspring in each box, going down.
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Young, M. (2005). Punnet square. Baylor College of Medicine, Center For Educational Outreach.
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