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hoanghongnhung72
2 năm trước
có 1 số trứng và một số tinh trùng tham gia thụ tinh, biêt hiệu suất thụ tinh của tinh trùng là 6,25. có 20 hợp tử đc tạo thành.hiệu suất thụ tinh của trứng là 50%. có 20 hợp tử đc tạo thàn. hãy tính: a) số trứng, số tinh trùng đc thụ tinh b) số tế bào sinh tinh c) số tế bào sinh trứng và số thể định hướng đã tiêu biến (1 tế bào sinh trứng tạo ra 1 trứng và 3 thể định hướng)
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