Identical twins have the same DNA because they formed from a single zygote that split to become two fetuses. They came from the same egg and the same sperm. Chimeras occur when there are two separate zygotes, different egg and sperm, and they merge to form one embryo.
Yes, she did. But, the courts only believed her after someone was sent to witness her third child being born (she was heavily pregnant) and see that the baby immediately got a blood test- one that also did not match Lydia's DNA.
We read an article about this in Forensics class. Chimera people are more likely to develop auto immune disorder- where the immune system attack the body's own cells because it doesn't recognize them and declares the cells a threat. Having two different DNA in the body causes the immune system to attack cells with one set of DNA because it only recognizes cells with the other DNA
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