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Heredity and personality

How much of one's Enneagram type is inherited?  It's probably not 100%, but probably not 0% either.  Beyond that, no one really knows.  To gather more information, I would like to conduct a preliminary survey.  I would really appreciate if you could spend a few minutes answering the following questions. I'm also looking for twins - if you are an identical twin, (or know one interested in the Enneagram), please contact me at the e-mail address below). Please answer as accurately as you can, but you may skip any question you wish.  Click "submit" when you're done, and your answers will be sent anonymously.

  Type/wing Confidence of type Confidence of wing: Gender Birth order
(1 is oldest child)
1. Your own
2. Biological mother    
3. Biological father    
4a. Biological sibling #1
4b. Biological sibling #2
4c. Biological sibling #3
4d. Biological sibling #4
5. Spouse  
6a. First biological child  
6b. Second biological child  
6c. Third biological child  

7. Types/wings/genders of additional blood relatives, children, siblings, aunts, uncles, etc?:

8. Any adopted relatives, and other circumstances not covered by the questions above?

9. You don't have to identify yourself, but if you do provide your e-mail address or contact info, it would help me identify duplicate entries and ask for clarifications, if necessary:

Thank you!