A.A.M. Ahmed – Assistant, Department of Biology and General Genetics, 

Institute of Medicine of Peoples' Friendship University of Russia (Moscow, Russia)

E-mail: bariiameen@hotmail.com

A. Ait Aissa – Assistant, Department of Biology and General Genetics, 

Institute of Medicine of Peoples' Friendship University of Russia (Moscow, Russia) E-mail: ait.mira90@hotmail.fr