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The recent studies on genetic defects tell us __________ A．Some diseases resul

The recent studies on genetic defects tell us __________

A．Some diseases result from an extra chromosome.

B．Some diseases are caused by a chromosome in short.

C．Faulty genes caused by mutation give rise to diseases like mongolism

D．Parents of mongoloid are likely to have more children of the kind.

提问人：网友ysh_19850701 发布时间：2022-01-07

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