Complex sentence: The domesticated turkey is a large poultry bird descended from the wild turkey ("Meleagris gallopavo "), one of the two species of turkey (genus"Meleagris").
Split into simpler sentences: The domesticated turkey is a large poultry bird. The modern domesticated form descends from the wild turkey ("Meleagris gallopavo "), one of the two species of turkey (genus"Meleagris").