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Unformatted text preview: genes. Mendel confirmed this hypothesis further (as he did in the monohybrid crosses) by backcrossing the F 1 dihybrid to the recessive parent. The Punnett square for the backcross looks like this: The phenotypic ratio for the testcross is: 1:1:1:1; that is, 1 purple inflated:1 purple constricted:1 white inflated:1 white constrictedwhich indicates that the traits have separated and recombined independently of one another....
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- Fall '08