The definition of Robertsonian translocation is （）

A.The two long arms of two separate acrocentric chromosomes are lost.

B.The two short arms of two separate acrocentric chromosomes are fused. The long arms are lost.

C.The two long arms of two separate metacentric chromosomes are fused. The short arms are lost.

D.The two long arms of two separate acrocentric chromosomes are fused. The short arms are lost.

正确答案：The two long arms of two separate acrocentric chromosomes are fused. The short arms are lost.