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许多生命现象,如配子和合子的形成,都具随机性。遗传学的三大规律,用概率统计的语言来说,就是有关随机事件的遗传规律。 1.随机事件某事物发生的一种情况或实验中得到的一种结果,称为一个事件。在一定条件下必然发生或不可能发生的事件分别称必然事件或不可能事件。如同型合子自交的后代为同型合子是必然事件,为杂型合子是不可能事件。这两类统称确定事件。在一定条件下可能发生,也可能不发生的事件称随机事件。如杂型合子Aa自交,自交一代中个体基因组合的可能结果是AA、
Many phenomena of life, such as the formation of gametes and zoos, are random. The three laws of genetics, in terms of probabilistic statistics, are the genetic laws governing random events. 1. A random event A situation or experiment results of a result, known as an event. Under certain conditions, events that inevitably occur or can not occur are called inevitable events or impossible events, respectively. It is an inevitable event that the offspring of homologous zygotic self-cross is the homozygote, and the heterozygous zygote is an impossible event. These two types of collectively identified events. Under certain conditions, may or may not occur as random events. If the heterozygous Aa self-selfing, the possible result of the individual genetic combination in the self-generation is AA,