不讲理的基因突变论

sunsong7

A somatic cell (Greek: σὠμα/soma = body) is any biological cell forming the body of an organism; that is, in a multicellular organism, any cell other than a gamete, germ cell, gametocyte or undifferentiated stem cell. By contrast, gametes are cells that fuse during sexual reproduction, for organisms that reproduce sexually; Germ cells are cells that give rise to gametes; Stem cells are cells that can divide through mitosis and differentiate into diverse specialized cell types. For example, in mammals, somatic cells make up all the internal organs, skin, bones, blood and connective tissue. By contrast, mammalian germ cells give rise to spermatozoa and ova which fuse during fertilization to produce a cell called a zygote, which develops into an embryo. Somatic cells are diploid（ Campbell, Neil A.; Reece, Jane B.; Urry, Lisa A.; Cain, Michael L.; Wasserman, Steven A.; Minorsky, Peter V.; Jackson, Robert B. (2009). Biology (9th ed.). p. 229. ISBN 978-0-8053-6844-4.）

Sakya

现在本人更倾向于关键性的基因突变/表观遗传变化在干细胞中的累积引发肿瘤。