下列关于基因的描述，不正确的是（　　）

A．基因是DNA片段

B．基因具有特定的遗传信息

C．一般来说，基因是由父母传下来的

D．一个基因包含所有遗传信息

— What will they do this weekend?

— They will go hiking ______ the weather is fine. [ ]

A. as if

B. as long as

C. as well as