Mendel tested for heterozygotes by using a

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A testcross is the best way to test for heterozygotes because it involves crossing the unknown genotype with a known homozygous recessive individual. This will reveal whether the unknown individual has one or two copies of the dominant allele, indicating whether they are heterozygous or homozygous dominant, respectively. A dihybrid cross involves two traits and is not specific to testing for heterozygosity, while a monohybrid cross and true-breeding cross do not involve testing for heterozygotes at all.

Mendel Tested for Heterozygotes by Using a