Question

Which one shows codominance?

• A. Alleles of blood groups A and B
• B. Alleles of normal blood and sickle cell
• C. Alleles for dots and bands in Ladybird Beetle
• D. All the above.

Answer 1

The correct option is A Alleles of blood groups A and B

Expression of phenotypes of both parents in heterozygous condition is called codominance. In this, no existence of dominant and recessive traits i.e both the alleles when present (heterozygous condition) are phenotypically expressed

So, the correct option is ‘Alleles of blood groups A and B’