Deletion of chromosome results from the breakage of a chromosome in which the genetic material is lost during cell division. Breakage of chromosome can happen anywhere on the chromosome. Deletion is the loss of genetic material and it can be caused by errors in the crossover of chromosomes during meiosis.
Dark Angel (TV series) Dark Angel is an American cyberpunk television series that premiered on the Fox network on October 3, 2000. Created by James Cameron and Charles H. Eglee, it starred Jessica Alba in her breakthrough role.
A dark nebula (or dark cloud) is a very dense part of a bigger molecular cloud; the light extinction is caused by the high density and the presence of interstellar dust in these clouds. These are the regions where new stars are forming.