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全国全日制高中生物课本第二章第二节有减数分裂的内容。这部分知识是高中生物教学中的重点和难点。在教学中有以下问题值得注意。 (一)减数分裂发生的时期有人认为:“豌豆的减数分裂发生在豌豆的精原细胞产生精子和卵原细胞产生卵子之时”,还有人说:“生殖细胞在花粉管里进行减数分裂形成两个精子”。这些说法都是没有弄清高等植物减数分裂在生活史中发生的时期,前一种说法还把高等植物和动物混为一谈,豌豆哪里来的精原细胞和卵原细胞?
National Day full-time high school biology textbook Chapter II, Section II, has the content of meiosis. This part of knowledge is the focus and difficulty in high school biology teaching. In teaching there are the following issues worth noting. (A) the period during which meiosis occurred Some people think: “pea meiosis occurs in the spermatogonial pea sperm and egg cells produce eggs at the time”, others said: “germ cells in the pollen tube to reduce Split number to form two sperm. ” These statements are not clear higher plants in the history of meiosis occurred in the period, the former argument also confused higher plants and animals, peas where the spermatogonia and oogonium?