How can Blood type determine who your parents are? In the 1940s, a woman claimed that a famous Hollytiood actor, Charlie Chaplain was the father of her baby. Blood tests revealed that Chaplain had type O blood the woman had type A blood and the baby had type B blood. Blood tests were not admissible as evidence in courts of law at that time. Based on the testimony of witnesses, the court ruled in favor of the woman. Based on blood type, would you agree or disagree with the court's decision? Use Punnett squares to present your arguments.