In heterozygous condition,the individual expression of both the alleles in the phenotype is exemplified by

  • A
    Colourblindness
  • B
    $AB$ blood group
  • C
    Rh factor
  • D
    $A$ and $B$ blood group

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Codominance is shown by the gene controlling:

$A$ roan bull is crossed with three cows. Cow $A$ has the same genotype as the roan bull,cow $B$ is red,and cow $C$ is white. What should be the proportion of roan offspring in each group of cows?

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What is the phenomenon called where factors produce independent effects in their heterozygous condition?

$MN$ blood group system is due to

All of these obey Mendel's laws except:

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