All about genetic terms and genetic deffects

Informative and easy to understand website that written by specialists.

It gives good overview for many genetic defects including those related to abnormal blood conditions such as thalassemia, hereditary spherocytosis etc. 

The main page of the webesite http://ghr.nlm.nih.gov/

THe main page of the condtions http://ghr.nlm.nih.gov/BrowseConditions