????? ??? ??, ?? ??? ??? ??? ? ?? ?? ??????. ???? ???? ??? ? ?? ?? ??? ?????.?? ????? ???? ??? ???? ?? ??? ? ?? ???? ??? ? ????. ?? ????? ??? ????? ??? ???? ?? ???? ??????!A chromosomal abnormality consisting on the absence of one of several copies of chromosome 7 in somatic cells. [from NCI]???? ???? ?? ?????, ??, ?? ? ??(??)??? ???????.g., front