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.
Kilrush (Irish: Cill Rois, meaning Church of the Woods) is a coastal town in County Clare, Ireland. It is also the name of a civil parish and an ecclesiastical parish in Roman Catholic Diocese of Killaloe. It is located near the mouth of the River Shannon in the south-west of the county. Kilrush is one of the listed Heritage Towns of Ireland. The area was officially classified as part of the West Clare Gaeltacht; an Irish-speaking community; until 1956.