Which of the Following Is (Are)findings/theories Regarding Contiguous Gene Syndromes

Multiple Choice

Which of the following is (are) findings/theories regarding contiguous gene syndromes discussed by Lupski?

A) Microdeletions probably occur during the first mitotic stages of the fertilized egg and are thus perpetuated throughout the entire body.
B) Frequent chromosome areas of microdeletion are sandwiched between areas of high copy repeats.
C) In theory for every microdeletion identified, there should be a corresponding microduplication.
D) All of the above.