根本上，ADHD是一种遗传现象，已经有大量的研究表明实际上adhd是可遗传的，而不是我们曾经猜想的因家教不当造成的结果。

For what is, at root, a genetic phenomenon, that is a lot-yet many studies have shown that ADHD is indeed genetic and not, as was once suspected, the result of poor parenting.

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偏分离是遗传作图中的普遍现象，是一种强有力的进化动力。

Segregation distortion, which is identified as a strong evolutionary force, is common in genetic mapping.

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