ở lợn, xét các trường hợp sau đây a. có 18 tinh bào bậc 1 tiến hành giảm phân. Trong tất cả các tinh trùng được tạo ra thấy chứa 1368 nhiễm sắc thể. Xác định: tổng số tinh trùng đã được tạo ra, số nhiễm sắc thể 2n của loài b. Có 38 noãn bào bậc 1 giảm phân. Hãy xác định: số trứng được tạo ra và số nhiễm sắc thể có trong các trứng, số thể cực được tạo ra và số nhiễm sắc thể có trong các thể lực

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