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.
Kiwanis is ready for you! Reach out to a Kiwanis club in your community and let them know youâd like to join. Contact a club member or officer. Let them know youâd like to learn more about Kiwanis. Try these tips for contacting a local Kiwanis club: 1  Find a club. 2  Locate a Kiwanis club in your area. 3  Choose up to three club locations near you to receive a personal guest invitation. 4  Visit a club.