留美老师带你每日说英文 第389期:左撇子是遗传的么?

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台湾籍旅美老师今天交给我们的句子是：

And despite what many may think, handedness is not a choice. It can be predicted even before birth based on the fetus' position in the womb. So, if handedness is inborn, does that mean it's genetic?
而且，与大多数人所认为的相反，要用哪只手不是我们选择的。它甚至可由胎儿出生前在母体的胎位预测出来。那如果用哪只手是与生俱来的，意思是那是遗传的吗？