Ở Tinh tinh có 2n = 48. Xét ba nhóm tế bào khác nhau: + Nhóm tế bào thứ nhất có 1536 NST ở dạng sợi mảnh. + Nhóm tế bào thứ 2 có 960 NST kép. + Nhóm tế bào thứ 3 có 1344 NST đơn đang phân li về hai cực của thoi vô sắc. Hãy xác định: Các tế bào trong mỗi nhóm đang ở vào kỳ nào? Số lượng tế bào trong mỗi nhóm. Biết rằng mọi diễn biến trong các tế bào trong mỗi nhóm là như nhau.

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