Гены окраски шерсти кошек расположены в Х–хромосоме. Черная окраска определяется геном ХB, рыжая — геном Хb, гетерозиготы имеют черепаховую окраску.

Elfivaya tower. Paris. France. 1887-1880. On the floors of the tower is: Television, radio, cellular communications, observation deck and restaurant. Height: Antenna / Spire 324 m Roof 300.65m. Weight 10.000tonn. Technological parameters: Architect Eifel Gyusthe Alexander. Elfivaya Tower: mitalicheskaya tower in the center of the city of Paris, his most recognizable architectural dostpromichatelnost: also known worldwide as a symbol of France!