(genetics). (1) (Of, or pertaining to) An allele or a gene that is expressed in an organism âs phenotype, masking the effect of the recessive allele or gene when present. (2) (Of, or pertaining to) An organism that expresses the dominant gene (or allele).
Triceratops was a species of herbivorous dinosaur. Triceratops lived during the Mesozoic Era, during the days of the late Cretaceous period. A large herbivorous dinosaur, Triceratops grazed on plants and relied on its horns and frilled head for defense, cutting away at plants with its sharp beak. were larger relatives of the Chasmosaurus. They appear in Ice Age: Dawn of the Dinosaurs, The Triceratops are shown very briefly, wading through a pond.
They made up the bulk of the herbivore population just before the end of the Cretaceous period. Triceratops had a skull that reached up 6 ft (2m) in length with three protective horns and a great frill of bone that served for muscle attachment to the neck as well as protection from predators. Triceratops had one short horn above its beak and two long, double-recurved brow horns (up to 3 ft/90 cm long). been used in mating rivalry and rituals. Its head with large eyes was almost one-third as long as its body (up to 10 ft/3 m long) and was the largest ever possessed by a land animal. Its tough beak was toothless, but Triceratops had many cheek teeth and powerful jaws.