下列现象属于可遗传变异的是A．亲兄弟俩，哥哥直发而弟弟曲发B．

下列现象属于可遗传变异的是

A．亲兄弟俩，哥哥直发而弟弟曲发	B．断尾的壁虎再生出有尾的壁虎
C．运动员经常锻炼形成的发达四肢	D．受巨响导致的耳聋

答案

B解析:
断尾的壁虎再生出有尾的壁虎这是由于遗传物质发生改变所引起的变异,能够遗传给后代，叫做可遗传变异。

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