Mendel's carried out dihybrid cross to show independent assortment of traits. He took two parents differ in two kinds of traits like one parent with round and green seeds and other with yellow and wrinkled seeds. By crossing these two parent we get four progenies with different combination of traits which are 9 round and yellow, 3 round and green, three wrinkled and yellow and 1 wrinkled and green. This cross shows that all the traits assort independent of each other in the coming progenies which proves the law of independent assortment.
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