Ở một loài sinh vật lưỡng bội, xét một tế bào nhân đổi liên tiếp 4 lần, các tế bào tạo thành chứa tổng số 384 nhiễm sắc thể. a. Xác định bộ nhiễm sắc thể lưỡng bội của loài? b. Do có hiện tượng đột biến xảy ra, khi quan sát hai hợp tử cùng loài trên, nhận thấy: - Hợp tử 1: sau 3 lần nguyên phân liên tiếp, môi trường nội bảo cung cấp 252 nhiễm sắc thể. - Hợp tử 2: nguyên phân liên tiếp 4 lần, ở kì giữa của lần phân bào thứ 4, người ta đếm được trong các tế bào con có 352 crômatit. Xác định kí hiệu và số lượng bộ nhiễm sắc thể của hai hợp tử trên?

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