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.
Kitale is an agricultural town in northern rift valley Kenya situated between Mount Elgon and the Cherangani Hills at an elevation of around 1,900 metres (6,200 ft).[2] Its population is 106,187 as of 2009.[1]. Kitale is the capital town of Trans Nzoia County. The National Museum of Western Kenya is located at Kitale. It is a natural history museum and was originally created by Lt Col. Hugh Stoneham in 1926.