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namkhanh2010
2 năm trước
Ở cà chua gen A quy định quả đỏ , gen a quy định quả vàng , gen B quy định quả tròn , gen b quy định quả bầu dục . Khi cho lai giống quả cà chua đỏ , tròn vs quả cả chua vàng , bầu dục . Ng ta thu được toàn quả đỏ tròn . Tiếp tục cho F1 giao phấn với nhau thu được F2 . Hãy vt sơ đồ lai từ P đến F2
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