A testcross involves an individual exhibiting the dominant phenotype but an unknown genotype being crossed with an individual that has a(n) genotype.

What evidence did mendel find that supported his law of independent assortment? a. some traits are controlled by several different genes. b. a trait can be passed on from a parent to an offspring. c. most traits have a dominant form and a recessive form. d. different traits are passed on independently of each other.