HEREDITY
CODOMINANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2:2 or 1:1 (red:speckled)
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2:2 or 1:1 (red:blue)
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2:2 or 1:1 (blue:speckled)
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1:2:1 (red:speckled:blue)
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Detailed explanation-1: -Codominance is also seen in plants. For example, rhododendrons with simultaneous expression of red and white genes for flower colour display flowers with both red and white petals.
Detailed explanation-2: -The best example of codominance is ABO blood group. ABO blood grouping is controlled by gene I which has three alleles A, B, and O and show codominance. An O allele is recessive to both A and B. The A and B alleles are codominant with each other.
Detailed explanation-3: -This type of allelic relationship was termed codominance. It appears as if the red and white alleles are interacting in the heterozygote to generate the pink flowers. Another example of codominance can be seen by looking at a biochemical phenotype.
Detailed explanation-4: -In snapdragon i.e. Antirrhinum majus, the flower color is controlled by incomplete dominance. The snapdragon flower has two flower colours, red (RR) and white (rr). When cross-pollination occurs between red and white flowers, a pink (Rr) snapdragon flower is produced.