Bolnykh I. I. RussiaTyumenTyumen State University, 10 Semakova Str., Tyumen 625003, Russiazhigileva@mail.ru Author's articles COLOR POLYMORPHISM AND GENETIC VARIABILITY OF THE SAND LIZARD (LACERTA AGILIS) (LACERTIDAE, SAURIA) IN THE SURROUNDINGS OF THE TYUMEN AND STERLITAMAK CITIES