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.
World map with the intertropical zone highlighted in crimson. Tropical climate zones of the Earth where all twelve months have mean temperatures above 18.0 Â°C (64.4 Â°F) The tropics are a region of the Earth surrounding the equator.