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Is DNA accurate on siblings with the same mother but different fathers?

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I think what you mean to ask is "is DNA testing reliable to determine siblingship in two individuals with the same mother but not the same father?" The answer is, yes, but it depends. DNA is the material that codes for the genes which are essentially the blue print for how we are made. We have 46 chromosome, 23 we get from our mother and 23 from our father. We also get some mitochondrial DNA from our mother only. So testing depends on the individual sex of the children involved, but using mitochondrial DNA, it is quite accurate, since all children born of a certain female should share this DNA.
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If you have the same mother but different fathers are you half-siblings?

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Is DNA accurate on siblings with the same father but different mother?

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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 wit