Theallowednumberrepresentationsaretwo ' s - complement , one ' s - complement , andsigned- magnitude . note thatall of these number systemsagree on the representationofpositivenumbers.
South Korea's researchers have taken egg cells from volunteer women, removed the nuclei from those cells (which contain only half of the genetic complement required to make a human being, since the other half is provided by the sperm), and replaced each nucleus with one taken from one of the volunteer's body cells (which contains a full genetic complement).