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 tropical savannas region lies in a tropical climatic zone (Bureau of Meteorology 1989) where temperatures are warm throughout the year and there are two distinct seasons: the 'wet' and the 'dry'. The 'wet' season lasts from approximately November through to April.