ở chuột, gen N- lông ngắn, n- lông dài. gen M- lông đen, m- lông trắng. các gen nằm trên các cặp NST khác nhau và phân li độc lập. cho hai chuột khác nhau giao phối với nhau ở F1 thu được 1 ngắn,đen: 1 ngắn,trắng: 1 dài, đen: 1 dài,trắng. a. hãy biện luận và tìm KG của cặp P trên. b. giả sử một phép lai khác thu đc F1 có 6,25% chuột dài, trắng. hãy tìm KG P đó.

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