“减数分裂”在高中生物教学中贯穿始终,而且一直是教学中的难点,起着承上启下的作用。本节知识是在第一课时学习了相关概念,精子形成过程的基础上,来学习卵细胞的形成过程,精子与卵细胞形成过程的比较,绘制出整个分裂过程中染色体、DNA及染色单体的变化图像。从备课到上课都给了我不少的思考。下面和大家一起分享本节课的心得。 “Meiosis ” in the biology teaching in high school throughout, and has been the teaching of the difficulties, plays the role of link. This section of knowledge is in the first class to learn the related concepts, based on the process of sperm formation, to learn the process of egg formation, sperm and egg cell formation process comparison, draw the entire division of chromosomes, DNA and chromatid changes image. From preparation class to class have given me a lot of thinking. Now share with everyone the lessons of this lesson.