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.
The Iwetemlaykin State Heritage Site is a rolling grassland set amidst stunning backdrop of the Wallowa Mountains. Pronounced Ee-weh-TEMM-lye-kinn, the name translates to âat the edge of the lake.â The property is adjacent to a Nez Perce National Historical Park, site of Old Chief Joseph Gravesite and Cemetery.