Could you explain to me something about genetics:
Why is there two variants of the R1 haplogroup, R1a and R1b, but there's no R1c clade? Or even R1d? what differentiates the clades?
Why is there two variants of the R1 haplogroup, R1a and R1b, but there's no R1c clade? Or even R1d? what differentiates the clades?
