The Y chromosome does not cause color blindness. Colorblindness is a defective gene on the X chromosome. Females have 2 x chromosomes, thus one can serve as a backup for a defective gene. However, the Y chromosome in males is almost totally defective, thus does not have a backup.olorblindness is a defective gene on the X chromosome. Females have 2 x chromosomes, thus one can serve as a backup for a defective gene. However, the Y chromosome in males is almost totally defective, thus does not have a backup.
Kilwa Kisiwani (also known as Kilwa or Quiloa in Portuguese) is the best known of about 35 medieval trading communities located along the Swahili Coast of Africa.
Gisenyi. is situated on the banks of picturesque Lake Kivu in western Rwanda, a 3-hour road journey from Kigali. It is an attractive, though somewhat faded, lakeside resort, which is also a border crossing point into the Congo. Lodging: Serena Hotel Lake Kivu: Expensive. The brand-new, 4-star Kivu Sun is the best hotel in Gisenyi, on the shores of Lake Kivu in western Rwanda. The hotel is right on the lake and offers views across the water to the Virungas volcanoes. The hotel provides accommodation in 66 rooms, including 6 suites, 23 family rooms and a room for people with disabilities.