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INCOMPLETE DOMINANCE IN SNAPDRAGONS

Example: Incomplete dominance is seen in cross-pollination experiments between red and white snapdragon plants. In this monohybrid cross, the allele that produces the red color (R) is not completely expressed over the allele that produces the white color (r). The resulting offspring are all pink. The genotypes are: Red (RR) X White (rr) = Pink (Rr) Ucenter Dress extra sized wearing in formal situation ... .

When the F1 (first filial) generation (consisting of all pink plants) is allowed to cross-pollinate, the resulting plants (F2 generation) consist of all three phenotypes [1/4 Red (RR): 1/2 Pink (Rr): 1/4 White (rr)].

The phenotypic ratio is 1:2:1.

When the F1 (first filial) generation is allowed to cross-pollinate with true breeding red plants, the resulting plants (F2 generation) consist of red and pink phenotypes [1/2 Red (RR): 1/2 Pink (Rr)]. The phenotypic ratio is 1:1.

When the F1 (first filial) generation is allowed to cross-pollinate with true breeding white plants, the resulting plants (F2 generation) consist of white and pink phenotypes [1/2 White (rr): 1/2 Pink (Rr)].