Re: Something something pun about Horizon
What you are talking is a well known genetic situation that is called chimerism, rare, but well studied. A person or animal born out of two fused embryos that would have produced twins but in this case one embryo absorbs the other and the resulting fetus and afterwards person may have cells with the DNA of the absorbed embryo and cells of the prevailing embryo. The DNA changes usually in certain organs but it doesn’t have to.
If North American geneticists do not know about this circumstance then it’s a problem with American experts and not a problem with proper made DNA tests