高中新教材 (人教版 )在今年新学年 ,将在许多省市试行。其中第二册实验十三是“观察果蝇唾腺的巨大染色体装片”实验。通过这个实验 ,使学生了解染色体的实际形态。对学生来说原先看不见、摸不着的基因只能靠想象 ,而现在却有了一定的感性认识 ,意义很大。可是做这个实验 ,难 New high school teaching materials (PEP) in the new school year, will be piloted in many provinces and cities. The second experiment, thirteen, was an experiment “observing the huge chromosomal loading of the Drosophila salivary gland.” Through this experiment, enable students to understand the actual form of chromosomes. For students, the original invisible, invisible genes can only rely on imagination, and now it has a certain perceptual knowledge, great significance. But to do this experiment, it is difficult