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易错点1涉及DNA片段的增添、缺失或改变一定属于染色体变异例1(2012浙江高考变式)现有不抗病矮秆玉米种子(甲),研究人员欲培育抗病高秆玉米,进行以下实验:取适量的甲,用合适剂量的γ射线照射后种植,在后代中观察到白化苗4株、抗病矮秆1株(乙)和不抗病高秆1株(丙).对上述l株白化苗的研究发现,控制其叶绿素合成的基因缺失了一段DNA,因此该基因不能正常表达,功能丧失,无法合
Error-prone 1 Involves DNA fragment addition, deletion or change must belong to chromosome variant 1 (2012 Zhejiang college entrance examination variant) Existing non-resistant dwarf corn seed (A), the researchers want to cultivate resistant high-stalk corn, carried out The following experiment: take the appropriate amount of a, with the appropriate dose of γ-ray irradiation after planting, in the progeny observed 4 albino seedlings, disease-resistant dwarf 1 (B) and non-disease resistant stalk 1 (C) The l plant albino seedling study found that the control of its chlorophyll synthesis gene missing a piece of DNA, so the gene can not be normal expression, loss of function, can not be combined