One Y-chromosomal DNA analysis suggests two clades (subgroups) within the genus: The first clade contains domestic goats (C. hircus), bezoars (Capra aegagrus), and markhors (C. falconeri). The second clade contains all other ibex, including the Nubian ibex. In this analysis, the Nubian ibex is monophyletic (most closely related) to the Siberian ibex (C. sibirica).
