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Same Mother, Different Fathers ... Half Siblings:
  • Yes, if you have the same mother but different fathers then you are half brothers or half sisters. However, if you and another sibling had the same father then you are not half siblings but brother and sister. It's the gene pool so it doesn't matter if your mother gave birth to you or not, if it's a different father then you are a half brother or half sister.
  • No, if you have the same mother, you are not half siblings, only if you have different fathers, you are a half siblings. Nothing from the womb is half.

Obviously the person who answered the question above is not very educated. This seems to be a misconception among the black community, (no offense... I'm half black myself). It doesn't matter if siblings share the same biological mother or father because you receive half your DNA from your mother and half from your father. So, to answer your question... it doesn't matter if you share the same mother or father, you're half siblings either way. Looks like the person above was sleeping in their science class or just a victim of misinformation.

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15y ago

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How is Nathan Eminem's half brother?

They have the same mother and different fathers.


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Individuals who share the same mother but have different fathers are known as half-siblings. They are related through their mother but only share one biological parent.


What does science say about siblings with same mother different fathers?

They are half siblings.


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How does having the same mother and different fathers make you a whole sibling verses have the same father and different mother Doesn't the dna of the father determine that?

I believe that if you have the same dad then you are not half bro/sis. I believe that it is the dna of the father that determines biological siblings. I have five children with my husband and three of them have different mothers and I tell them all the time that they are NOT step anything or half anything because they all have the same dad. That's my story and I am sticking to it unless the world of medicine proves me wrong:)