激光能使一个染色体造成局部缺损或整个丧失,结果失去局部或全部的遗传信息;激光能引起染色体断裂或形成片断,断裂的染色体可改变位置,以新的格局重新结合起来,形成所谓移位现象;一个片断的染色体可以180°转向,然后重新接合于染色体上面构成全新的染色体组型,即出现所谓倒置现象;激光能使染色体局部重复和造成染色体数量增减;此外激 Laser can make a chromosome cause local damage or loss, resulting in the loss of some or all of the genetic information; laser can cause chromosome breakage or the formation of fragments, broken chromosomes can change position, with a new pattern of recombination, the formation of the so-called shift phenomenon ; A fragment of the chromosome can be 180 ° turn, and then re-joined to the chromosome to form a new genomics, the so-called inversion phenomenon; laser can make local chromosome duplication and cause the number of chromosomes increase; extrinsic