These occur in reproductive cells like eggs and sperm and are called germ line mutations. Effects of germ line mutations. A single germ line mutation can have a range of effects: 1  No change occurs in phenotype. 2  Some mutations don't have any noticeable effect on the phenotype of an organism.
Generation Dead is a young adult supernatural romance novel by Daniel Waters. The book is a modern reworking of the zombie genre of fiction.
Alien is a science-fiction horror franchise centered on a film series that depicts Warrant Officer Ellen Ripley ( Sigourney Weaver ) and her battles with an extraterrestrial lifeform , commonly referred to as the Xenomorph , the Alien  or  Xenomorph XX121 .