Q. In the generation of a Mendelian dihybrid cross, the number of phenotypes and genotypes are

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Solution:

When at a time two traits and their alternative forms are considered then that cross is known as dihybrid cross.
Solution In F2 generation, we can see that four phenotypes are present i.e. Yellow round=9 Green round=3 Yellow wrinkled=3 Green wrinkled=1
And 9 genotypes are present(1:2:1:1:2:4:2:1:2:1)