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I was watching the history Channel and this topic came up, I tried researching it but not much luck, Does anyone know where it came from, just curious..
Each person has two Rh factors in their genetics, one from each parent. The only way for someone to have a negative blood type is for both parents to have at least one negative factor. For example, if someone's Rh factors are both positive, it is not possible for his or her child to have a negative blood type.May 1, 2016
https://www.carterbloodcare.org › th...
Each person has two Rh factors in their genetics, one from each parent. The only way for someone to have a negative blood type is for both parents to have at least one negative factor. For example, if someone's Rh factors are both positive, it is not possible for his or her child to have a negative blood type.May 1, 2016
https://www.carterbloodcare.org › th...