Addition (often signified by the plus symbol +) is one of the four elementary, mathematical operations of arithmetic, with the others being subtraction, multiplication and division. The addition of two whole numbers is the total amount of those quantities combined.hen addition is used together with other operations, the order of operations becomes important. In the standard order of operations, addition is a lower priority than exponentiation, nth roots, multiplication and division, but is given equal priority to subtraction.
Xeroderma pigmentosum is one of the inherited DNA repair disorders, which also include Cockayne syndrome, trichothiodystrophy, Bloom syndrome, RothmundâThomson syndrome, and Werner syndrome. It is inherited as an autosomal-recessive disorder and is characterized by a hypersensitivity of the skin to ultraviolet radiation, a deficiency in the repair of damaged DNA, and a resultant high incidence of skin cancers.
It is believed that the genes affected by Werner Syndrome are prevented from reco,mbining, replication and repair. People living with Werner Syndrome may have a lot of tumors, thyroid tumors and soft tissue sarcomas and meningioma's.ost cancers affect epithelial tissue, but those that onset because of Werner Syndrome are just as likely to appear in the connective tissue and muscle. Unusually, the cancers that are seen the most often with this condition usually affect children but are present in adults with the condition in their 40s and 50s.