[Campbell Biology P.346] In the F1 generation of the dihybrid cross shown in Figure 15.4 YyR... | Practice Question

In the F1 generation of the dihybrid cross shown in Figure 15.4 YyRr , how many different types of gametes can one plant produce with respect to these two genes?

  • A: 1
  • B: 2
  • C: 4
  • D: 8

Explanation

Due to the independent assortment of the two chromosome pairs, a YyRr plant produces four types of gametes in equal proportions. The possible combinations of alleles are YR, yr, Yr, and yR, as shown at the bottom of the meiosis diagram.