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dat123
2 năm trước
Bài 5: Đem lai trâu đực trắng (1) với trâu cái đen (2) đẻ lần thứ nhất được một nghé trắng (3), lần thứ hai một nghé đen (4) . Nghé đen này lớn lên giao phối với trâu đực đực đen (5) sinh ra nghé trắng (6). Tìm kiểu gen của 6 con trâu trên. Ghi đúng rõ ràng,cộng điểm.
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