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短蔓×短蔓西瓜品种Ｆ_１代遗传情况分析西瓜品种有长短蔓之分，长蔓和短蔓杂交Ｆ１代全部表现为长蔓（长蔓完全显性），但短蔓品种间杂交Ｆ１代却会出现两种情况，即全部短蔓或全部长蔓．为什么会出现这种情况呢？现分述如下．１短蔓×短蔓Ｆ１代全部短蔓这种情况短蔓性?..
Short Mans × short-necked watermelon F_1 generation of genetic analysis of watermelon varieties have long and short of Man points, long-Man and short-Man-made F1 hybrids all showed long-winged (long man completely dominant), but the short cross-species F1 hybrids were There will be two situations, namely all short or all long vine. Why does this happen? Now is as follows. 1 short man × short man F1 all short man in this case short-man sex?