The author uses the example of achondroplasti dwarfism to A.show us how people

The author uses the example of achondroplasti dwarfism to

A．show us how people suffer from the disease.

B．illustrate that a single defective gene can give rise to a serious disease.

C．point out the causes of all genetic diseases.

D．relate a defective gene with a recessive gene.

请帮忙给出正确答案和分析，谢谢！

参考答案

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