Parents' possible genotypes
Claimants 1 and 2 are possible biological children. Claimant 3 is excluded .
John has blood type A, which means his genotype can be either AA or AO. Since Mary has blood type O, her genotype must be OO.
In any standard classroom lab activity, this was the classic "Pedigree Mystery." Students would immediately point fingers at infidelity or a mix-up at the hospital. But Aris knew this family. Arthur had shielded Clara since the day she was born, and the hospital records from twenty years ago were flawless.
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Now, the real detective work begins. The thief must meet criteria:
Here are some basic points about blood type genetics that might help in solving a pedigree mystery:
Could the father (Type AB) have been the biological son of the paternal grandparents (Type A and Type B)?
The mystery unfolds when the family lawyer arrives to read Joseph’s will, only to discover that a sum of money—equal to one person’s share of the estate—has been stolen from a safe. The only clues are a trail of on the safe door and a witness statement from the maid, who saw a masked figure with attached earlobes fleeing the scene.
Pedigrees are used in genetics to trace the inheritance of traits or conditions through generations of a family. When it comes to blood type, understanding a family's pedigree can help predict the possible blood types of offspring based on the genotypes and phenotypes of the parents.