including relationship between jefferson family and hemings family:
“The results clearly show that the male-line descendants of Field Jefferson and Eston Hemings have identical Y-chromosome haplotypes (the particular combination of variants at defined loci on the chromosome). Scientists note that there is less than a 1 percent probability that this is due to chance. Thus the haplotype match is over one hundred times more likely when Jefferson and Eston Hemings are genetically related through the male line. This study by itself does not establish that Hemings’s father was Thomas Jefferson, only that Hemings’s father was a Jefferson.”
It is my informal understanding that current methods cannot distinguish between the alleged fathership of Thomas Jefferson versus the alleged fathership of various other Jefferson family males in relation to Sally Heming’s offspring, using the Y chromosome.
No, they can’t. But this isn’t the type of sequencing they do on crime dna.
They don’t have an actual Thomas Jefferson dna sample to match with so they have to use a known descendant proxy sample, using the Y chromosome because that’s the only one they can be sure was absolutely passed down.
But all the other Jefferson men who have the same grandfather have the same Y, so why it shows that some man in that family is the father it doesn’t prove which one it was. For that they would need a direct sample to do a full genome sequencing and match.
They will never get permission to dig up Thomas Jefferson.