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1. Giả sử một cây có kiểu gen AaBbDd tự thụ phấn. Biết rằng mỗi cặp gen quy định 1 tính trạng khác nhau, các gen kí hiệu bằng chữ in hoa quy định tính trạng trội, các gen kí hiệu bằng chữ in thường quy định tính trạng lặn. Hãy xác định: a. Tỉ lệ loại giao tử Abd; b. Tỉ lệ hợp tử AabbDD; c. Tỉ lệ hợp tử có kiểu hình lặn cả 3 tính trạng; d. Các loại giao tử khi cây có kiểu gen Aa BD/bd 2. Kí hiệu bộ nhiễm sắc thể của một loài sinh vật như sau: Aa BD/bd Ee XX. Khi giảm phân bình thường, không có trao đổi đoạn, có thể tạo ra bao nhiêu loại giao tử khác nhau? Hãy viết kí hiệu các loại giao tử đó
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