Linkage disequilibrium.  Highs and lows.
Patterson
M
M
D015894:Genome, Human; D006801:Humans; D015810:Linkage Disequilibrium; D009419:Nerve Tissue Proteins / Q000235:genetics; D009456:Neurofibromatosis 1 / Q000235:genetics; D025542:Neurofibromin 1
D009419:Nerve Tissue Proteins; D025542:Neurofibromin 1