问答题
Using interrupted mating experiment, 5 Hfr strains (1, 2, 3, 4 and 5)were inspected to infer the sequence that these strains transfer several different genes (F, G, O, P, Q, R, S, W, X and Y)to an F-strain. According to the results, any strain had its particular transferring sequence, as follows (only the first 6 genes transferred are cited for any strain):
【正确答案】(1)因为Hfr转入F-的基因顺序，取决于F因子在供体染色体上整合的位点和方向，所以，原始菌株的基因顺序可以根据上述各Hfr株系直接推出。
原始菌株的基因顺序如下图所示：
原始菌株的基因顺序如下图所示：
【答案解析】