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ngoccaovp2007
2 năm trước
Ở 1 loài thực vật, gen A quy định quả đỏ trội hơn gen a quy định quả trắng, gen B quy định quả định quả dài trội hơn gen b quy định quả tròn. Thực hiện phép lai giữa cây có kiểu hình quả đỏ, tròn với quả trắng, dài được F1 có tỉ lệ kiểu hình 1 quả đỏ, dài : 1 quả đỏ, tròn : 1 quả trắng, dài : 1 quả trắng, tròn a. Từ kết quả phép lai có thể xác định được quy luật chi phối 2 tính trạng trên không? Giải thích? b. Cho cây có kiểu hình quả đỏ, dài và quả trắng, tròn ở F1 lai với nhau. Viết sơ đồ lai, xác định tỉ lệ kiểu gen và kiểu hình ở F2
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