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2 năm trước
Xét 2 cặp gen dị hợp nằm trên 2 cặp NST thường của một cá thể. Cặp gen Aa có chiều dài 4080A 0 trong đó gen A có tỉ lệ A:X= 3:7; gen a có số liên kết hi dro giữa Avà Tbằng số liên kết hiđro giữa G và X. Cặp Bb có ciều dài gấp 1.25 cặp Aa trong đó gen B có 3450 liên kết hiđro; gen b có tỉ lệ các nucleotit bằng nhau. -Tính số nu từng loại của mỗi gen?
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