Categories: Craniofacial phene

Possible human homologue (MIM number): 110100 (trait)

Cross-species summary: Horns are paired appendages with a bony core that is attached to the skull and a keratin outer sheath. There is substantial variation in the extent of horn growth, making classification difficult. However, in general, the presence or absence of horns can be attributed to the action of two alleles at an autosomal locus. The type of gene action varies considerably between and among species. Absence of horns is called 'polled'. See also entries for 'scurs'.

Species in which this phene is found:
taurine cattle (Bos taurus)
indicine cattle (zebu) (Bos indicus)
goat (Capra hircus)
sheep (Ovis aries)
domestic yak (Bos grunniens)
bighorn sheep (Ovis canadensis)
water buffalo (Bubalus bubalis)
kouprey (Bos sauveli)