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一日,有学生问我一家系图的问题(如图1),本来遗传学的概率计算确实比较麻烦,问此类问题实属正常,但是,这位同学的问题不在于计算,而在于不清楚何为近亲。题中问,若III7与III8婚配则属于%%。答案为“近亲结婚”。学生问:“为什么这两个人是近亲?”我尝试启发他,反问:“III7的妈妈与III8的爸爸是什么关系?”学生回答:“是兄妹!那么III7与III8就是表兄妹了吧!”我想这回应该没问题了吧,于是
One day, a student asked me a diagram of the problem (Figure 1), the genetics of the original probability calculation is indeed too much trouble to ask such problems are normal, but the classmate’s problem lies not in the calculation, but rather not Clearly what is a close relative The question asked, if III7 and III8 marriage belong to %%. The answer is “close relatives get married ”. The student asks: “Why are these two relatives?” “I try to inspire him and ask:” What is the relationship between III7’s mum and III8’s dad? “” The students replied: “It’s siblings! Then III7 and III8 are tables Brother and sister it! ”I think this time it should be no problem, then