Question

2.玉米的t,g,s三基因是连锁的,三基因杂合体与隐性纯合体测交,结果是:TG

Answer 1

问：2.玉米的t,g,s三基因是连锁的,三基因杂合体与隐性纯合体测交,结果是:TG

答：解:由以上数据可知TGs与tgS是亲组合、 tgs与TGS是双交换的产物，故这三个基因的排列顺序为tsg或gst()。t与s的重组值=(70+64+18+22)/(304+295+108+119+70+64+22+18)=17.4%s与g的重组值=(108+119+18+22)/(304+295+108+119+70+64+22+18)=26.7%实际双交换值=(18+22)/(304+295+108+119+70+64+22+18)=4%理论双交换值=17.4%26.7%=4.65%

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