Reproductive isolation from a cross between a horse and a donkey or between a mare and a donkey, respectively. These animals are nearly always sterile due to the difference in the number of chromosomes between the two parent species. Both horses and donkeys belong to the genus "Equus", but "Equus caballus" has 64 chromosomes, while "Equus asinus" only has 62. A cross will produce offspring (mule or hinny) with 63 chromosomes, that will not form pairs, which means that they do not divide in a balanced manner during meiosis. In the wild, the horses and donkeys ignore each other and do not
Equus (film) felt the explicit blinding was "potentially repulsive," and "much of the spirit of the play is lost as a consequence." The film received generally positive reviews, currently holding a 67% rating on Rotten Tomatoes, based on 18 reviews. In 2005, the American Film Institute nominated Richard Rodney Bennett's music for AFI's 100 Years of Film Scores. Equus (film) Equus is a 1977 British-U.S. drama film directed by Sidney Lumet and written by Peter Shaffer, based on his play of the same name. The film stars Richard Burton, Peter Firth, Colin Blakely, Joan Plowright, Eileen Atkins, and Jenny Agutter. The story