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近几年高考中,遗传题占的比重非常大,把遗传规律和实验相结合,既考查了遗传规律的知识,又涉及到实验知识,是当前高考的一个热点。在准确把握遗传基本规律的基础上,了解和掌握有关遗传实验所用的生物材料的遗传特点,可以很好地理解题意,找到解题思路。一、植物实验材料(一)豌豆、小麦、水稻等自交作物豌豆为孟德尔研究遗传规律时所用材料,小麦和水稻则是我国主要的粮食作物。它们在遗传上具有很多共同特
In recent years college entrance examination, the proportion of genetic problems accounted for a very large, the combination of genetic law and experiment, not only to examine the genetic law of knowledge, but also involves the experimental knowledge, is a hot college entrance examination. On the basis of accurately grasping the basic laws of inheritance, understanding and mastering the genetic characteristics of biological materials used in genetic experiments can well understand the questions and find solutions to the problems. First, the plant experimental materials (a) of pea, wheat, rice and other self-pollinated crops for Mendel’s genetic law used in the material, wheat and rice are China’s major food crops. They are genetically quite common