What are people who share the same mother but have different fathers?

Answer

If two people share the same mother but have different fathers, they are considered half siblings. The same can be said for two people who share a father but not a mother. Everybody gets half of their DNA from their mother and half from their father; therefore, two siblings that share only one parent would both have half of their DNA from that parent. Technically though, siblings that share the same mother will share a slight bit more DNA because mother's are responsible for a child's mitochondria (a cell organelle containing DNA and responsible for the majority of ATP production).
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A mother is a female parent and a father is the male parent.
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The terms half brother and sister refers to persons who have same mother but different fathers or the same father but different mothers. This is evident in step ...
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