短语词组短语one -locus genetic model 单基因座遗传模型two -locus model 双基因座模型single -locus model 单基因座模型random locus model 随机轨道模型generalised single locus model 广泛性单位点模式multiple gene locus model 多基因位点模型five -locus model 五基因座模型 返回 locus model