單項(xiàng)選擇題番茄中圓果對(duì)長(zhǎng)形果顯性,光皮果對(duì)桃皮果顯性。用雙隱性類型對(duì)這兩對(duì)相對(duì)性狀的雜合體進(jìn)行測(cè)交得下列結(jié)果:光皮圓果24,光皮長(zhǎng)果246,桃皮圓果266,桃皮長(zhǎng)果24。這兩個(gè)基因的交換率是()

A.24%
B.12%
C.8.6%
D.4%


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