“…Holocentric chromosomes have a centromere along their entire length rather than localized in the typical, X-shaped, monocentric chromosome. Because chromosomes of all Drosera except D. regia (Shirakawa, Nagano, et al, 2011) and D. slackii (Bennett and Cheek, 1990) lack a visible centromere constriction (Nontachaiyapoom et al, 2000; Kondo and Nontachaiyapoom, 2008), and all eight species tested so far undergo successful mitotic segregation after breakage (Sheikh et al, 1995; Furuta and Kondo, 1999; Shirakawa, Hoshi, et al, 2011; Zedek et al, 2016; Kolodin et al, 2018), researchers have hypothesized holocentromeres to be present in almost all Drosera . However, the distribution of phospho-histone 2A threonine-120, a histone commonly associated with the centromeric and pericentric region (Dong and Han, 2012; Wanner et al, 2015), indicates monocentromeres in three species from D .…”