Video: Nondisjunction and Aneuploidy. Learn why proper chromosome segregation is essential during meiosis. We'll see how having an extra chromosome can lead to Down Syndrome and also examine the consequences of having too few chromosomes. Disruptions to the delicate balance of cell division can have far-reaching effects. Biology 101: Intro to Biology / Science Courses.
The rights for the first four novels in the series were sold to Warner Bros. for Â£1,000,000 by J.K. Rowling. After the release of the fourth book in July 2000, the first film, Harry Potter and the Philosopher's Stone, was released on 16 November 2001.
The fifth film, Harry Potter and the Order of the Phoenix, was released by Warner Bros. on 11 July 2007 in English-speaking countries, except for the UK and Ireland, which released the movie on 12 July.ate in 1997, film producer David Heyman's London offices received a copy of the first book in what would become Rowling's series of seven Harry Potter novels.