Biology 0610 · IGCSE · Monohybrid inheritance

Monohybrid inheritance — practice question

The diagram illustrates the phenotypes of the blood groups in a family. Which statement about the parents’ genotypes is correct?

  • ABoth parents have alleles for blood group A and B.
  • BBoth parents have the allele for blood group O.
  • COnly the father has the allele for blood group O.
  • DOnly the mother has the allele for blood group O.

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