ion One character in peas that Mendel studied was yellow versus green seeds. A cross between a homozygous yellow line (GG) and a homozygous green line (gg) will result in F1 plants that are heterozygous (Gg) for this trait and produce yellow seeds. Part B: Punnett square Punnett squares are convenient ways to represent the types and frequencies of gametes and progeny in experimental crosses. This Punnett square shows the results of a Gg x Gg cross to form F2 progeny. Use your understanding of Mendel's Law of Segregation and the rules of probability to complete the Punnett square for this cross. Part C: Using the Punnett square to make predictions Use the completed Punnett square in Part B to answer the questions below about the F2 generation. Note that questions 3 and 4 require a more advanced evaluation of probabilities than do questions 1 and 2 because you have to consider all possible groupings and orders of three F2 seeds. If you need help with these calculations, use Hint 3.