The paper describes some associative aspects of various biochemical-genetic markers with the reproduction activity in ewes of the Botosani Karakul breed. The two most important reproduction parameters (fecundity and prolificacy) were analyzed according to the genotypes or phenotypes of polymorph systems (haemoglobin. transferrin. albumin and blood potassium) of females. https://jalyttlers.shop/product-category/fryer/