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.
It is located on the shores of Lake Victoria in the north of Tanzania, near the Kenyan border. The town offers much amusement to the passing visitors and is a point of cultural interest for people wanting to experience the vibrant life of people around Lake Victoria. Musoma is an administrative town of the Mara region. Musoma sits on the eastern edge of Lake Victoria not far from the Kenyan border. There are boats that take you across Lake Victoria from Musoma. Located near Butiama, hometown of the first president of Tanzania, Musoma houses the Mwalimu Julius K. Nyerere Museum.