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TRUE OR FALSE: In a case of co-dominance, the phenotype of the heterozygote is exactly the...

TRUE OR FALSE:

In a case of co-dominance, the phenotype of the heterozygote is exactly the same as the phenotype of one of the homozygotes.  

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Answer #1

Answer: FALSE

Explanation: The given statement can be easily contradicted by the example of ABO blood grouping, which is an example of co-dominance. In ABO blood grouping, there are three alleles, and . For the heterozygous genotypes , the phenotype is blood group AB. However, for the homozygous genotypes or , the phenotypes will be blood groups A and B respectively. Thus, we can see that the phenotypes of the heterozygote is different from that of the phenotype of one of the homozygotes.  

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