Scientist use the dihybrid crosses method to confirm that crossing over occurs.
Crossing over during meiosis occurs between two homologous chromosomes when parts of their chromatids are exchanged. Crossing over provides additional genetic variability which is confirmed by conducting a dihybrid cross.
So we can conclude that Dihybrid crosses method use by the scientists to confirm that crossing over occurs.
Learn more about crossing over here: https://brainly.com/question/927405