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nghianx0307
2 năm trước
Một tế bào của 1 loài sinh vật sau khi nguyên phân 1 số lần liên tiếp ,đếm ở các tế bào con có 2048 nst đơn .Quan sát ở tế bào của 1 loài sinh vật đó thấy nst ở trạng thái xoắn cực đại có 16 sợi cromatit .Xác định: a. số đợt nguyên phân của tế bào nói trên b.nếu tế bào đó nguyên phân 3 lần thì môi trường cung cấp nguyên liệu tương đương bao nhiêu nst đơn
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