四.由基因型频率来计算基因频率 以深红虎蛾为例 p=f(B)=(B的频率+12Bb的频率) 0.909+0.087×0.5 =0.909+0.0435 0.953 q=f(b)=(bb的频率+12Bb的频率) 0.004+0.087×0.5 =0.004+00435 =0.047四．由基因型频率来计算基因频率 以深红虎蛾为例： p = f (B) = (BB的频率+1/2 Bb的频率) =0.909+0.087×0.5 =0.909+0.0435 =0.953 q = f（b）=（bb的频率+1/2 Bb的频率） = 0.004+0.087×0.5 = 0.004+0.0435 = 0.047