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一、问题二倍体动物细胞有丝分裂和减数分裂图像识别是高中生物学习的难点。特别是有丝分裂和减数分裂中期、后期图像的识别,学生也知道看同源染色体,但部分学生仍犯糊涂:主要是对同源染色体认识不到位,一是常把着丝点断裂、姐妹染色单体分开后形成的两条大小相同的染色体当作同源染色体;二是不理解有丝分裂中也有同源染色体,不能与减数分裂区别开来。所以区分有丝分裂和减数分裂中期、后期图像成为学习死角。二、对策本人通过多年的高中生物教学实践,总结出了击破细
First, the problem of diploid animal cell mitosis and meiosis Image recognition is a high school biology learning difficulties. Especially in mitosis and meiosis metaphase, the identification of late images, students also know to see homologous chromosomes, but some students still confused: the main homologous chromosomes are not recognized, one is often the centripetal fracture, sister staining Monosomic two chromosomes of the same size formed as homologous chromosomes; Second, do not understand mitosis also has homologous chromosomes, can not be distinguished from meiosis. So the distinction between mitosis and meiosis metaphase, late images become learning dead ends. Second, the solution I passed years of high school biology teaching practice, summed up the breakdown of fine