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.
Jojo Siwa. Joelle Joni Siwa, known as JoJo Siwa, is the daughter of Jessalyn Siwa. JoJo began dancing at the age of 5 at her mother's dance studio. She first became popular when she competed on the hit Lifetime series, Abby's Ultimate Dance Competition. After competing on AUDC, JoJo went on to star on Lifetime's Dance Moms. Aside from dancing; JoJo also, ...