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遗传和变异是生命过程中的一对矛盾,遗传是保守的,而变异才是前进的。没有遗传,不可能保证物质的相对稳定性。没有变异,就不可能产生新的性状,物种的进化和新品种的选育就不可能了。生物的遗传与变异,经过自然选择形成了适合人类需要的各种品种,因此,遗传、变异、选择是生物进化和选育新品种的三个依据,生物的变异,大体上分为遗传的和不遗传的变异。遗传的变异是指变异发生,能够遗传下去,并在后代重复出现,它是由于有机体内遗传基础发生变化所引起的。不遗传的变
Heredity and mutation are a contradiction in the process of life. Inheritance is conservative while mutation is progress. Without heredity, it is impossible to guarantee the relative stability of matter. Without variation, it is impossible to produce new traits, the evolution of species and the breeding of new varieties is impossible. The inheritance and variation of organisms are the three bases for biological evolution and selection of new breeds. The variation of organisms is roughly divided into genetic and genetic Not genetic variation. Genetic variation refers to the mutation occurs, can be inherited, and repeated in the offspring, it is due to changes in the genetic basis of the organism. Not genetic change