“自交”与“自由交配”是高中生物遗传概率计算的一个重、难点,在多地区的高考中都曾考查过,所以有必要对两者进行一次全方位的剖析,以便让更多读者发现并掌握解决此类问题的规律和方法.一、自交、自由交配的三个不同1.概念不同自交是一种特殊的交配类型,有两种维度的理解.传统意义的自交仅限于植物,指的是植物两性花的自花传粉和雌雄同株植物的异花传粉.而广泛意义的自交是指具有相同基因型的个体进行的交配,既可以是植物,也可以是动物.但由于基因型 “Self ” and “free mating ” is a high school biological genetic probability calculation of a heavy, difficult, in the multi-district college entrance examination have been examined, it is necessary to conduct a comprehensive analysis of both, so that Let more readers find and master the rules and methods to solve such problems.A self-made, free mating of three different 1. Concept different Self-bred is a special type of mating, there are two dimensions of understanding.Traditional meaning Is restricted to plants and refers to self-pollination of the plant bisexual flowers and cross-pollination of the hermaphrodite plants, whereas the broad sense of selfing refers to the mating by individuals with the same genotype, either plants, It can be animal, but because of genotype