Dihybrid cross

This is when the parents differ in two traits.

When Mendel made his dihybrid cross, he crossed plants with Round and Yellow seeds with those with Wrinkled and Green seeds.

  • The round was the dominant seed shape and the yellow was the dominant seed colour. We will make the dihybrid cross below;

Parental Phenotypes:            Round and Yellow×Green and Wrinkled

Parental Genotypes:              RRYY×rryy

Parental Gametes:                 (RY)(RY)×(ry)(ry)

 (RY)(RY)
(ry)RrYyRrYy
(ry)RrYyRrYy

F1 Genotype:       RrYy

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