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.
The Subtropical Zone This zone refers to the areas that are just outside of the formal Tropical Zones. It is hot, but not quite as hot and humid as Tropical areas. Winters are mild to cool, but not cold enough for snow or frost.