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.
Costa Ricaâs location in the region of the Tropic of Cancer and Tropic of Capricorn is defined as the Tropical Zone and it confers tropical characteristics to its ecological environment: forests, waterways, soil, and climate. The flora and the fauna that has adapted in these conditions are therefore typically tropical.