Durum wheat is Triticum turgidum var. durum, and is a tetraploid with 2n=4x=28.[21] [21] Rhesus monkey (Macaca mulatta) 42 [65] Rat (Rattus norvegicus) 42 [66] Oats (Avena sativa) 42 This is a hexaploid with 2n=6x=42.