Investigate RFMix2 strand call mimicking

[mike-w-wilson]

Marcos S. claims RFMixv2 tends to call strand segments the same ancestry when run on 3-way admixed samples. He believes it falls near the ends of chromosomes or when a small segment is the third ancestry found. Below, the top image, is a karyotype of chr20 from one individual where he made this claim. In the second image, it is not occouring.

He suggested mixing two samples haplotypes that we know are different and running it through RFMixv2 to see if we can duplicate the strand mimic.

[mike-w-wilson]

Simulation data karyotypes did not show these double calls.