Hyper IgE syndrome is rare with less than 850 cases reported worldwide. It affects both boys and girls equally. It is due to genetic mutation in the gene on chromosome 4. In some cases, the genetic mutation has not been identified.
Report Abuse. The tropical zone is characterised by strongly monsoonal weather patterns, distinct wet and dry periods which are highly reliable, large quantities of rain and high intensity rainfall, high temperatures, and high rates of energy transformation.
Tropical climate zone. The tropical climate zone of our planet, occupy wide territories between the subequatorial climate zone and the 30-th parallel. In reality the tropic circles pass through 23.5Â° north and south latitude, but this is rather orientation than real border of the tropical climate zone. It is hardly likely to be found other climate zone with so contradictory characteristics.