The pedigree chart below shows the blood types of three members of a family. Which could be the blood types of individuals 1 and 2?

C

Explanation:

Since there is a blood group O in the offspring both the mother and the father must have the 'i' allele. That means that the father must have genotype: IAi, and the mother must have a genotype with a recessive allele. Options A is not possible since 2 parents with blood group A could never produce offspring with bloodgroup AB. Options B is not possible as the mother carries no recessive allele (hence would not be able to produce offspring with bloodgroup O). Option D is also not possible as in order to produce AB offspring, each parents must atleast have blood types A or B.

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they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b