HEREDITY
INCOMPLETE DOMINANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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4 purple
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1 red, 2 purple, 1 white
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2 red, 2 white
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1 red, 1 purple, 2 white
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Detailed explanation-1: -In radishes, the gene that controls color exhibits incomplete dominance. Pure-breeding red radishes crossed with pure-breeding white radishes make purple radishes.
Detailed explanation-2: -Codominance and incomplete dominance yield unique phenotypes for heterozygous offspring (Aa). Incomplete dominance results in heterozygotes with intermediate phenotypes, as in the case of snapdragons when parents with red flowers and white flowers are crossed resulting in heterozygous offspring with pink flowers.
Detailed explanation-3: -So the correct answer to our question about the expected phenotypic ratio of a dihybrid cross between two heterozygous individuals is (A) nine to three to three to one.
Detailed explanation-4: -Snapdragon also shows incomplete dominance by producing pink-colored snapdragon flowers. The cross-pollination between red and white snapdragons leads to pink color flowers because none of the alleles (white and red) is dominant.