No, Marise. I thought I explained this in detail. First cousin marrige is forbidden among the Amish. Sibling marriage, likewise, is considered incest. Scott Scott E. Antes Northern Arizona University Department of Anthropology PO Box 15200 Flagstaff, AZ 86011 ________________________________________ From: Parkinson's Information Exchange Network [[log in to unmask]] On Behalf Of schild.m [[log in to unmask]] Sent: Sunday, August 02, 2009 5:33 AM To: [log in to unmask] Subject: Re: Amish got PD > Could this high prevalence of PD be due to genetic factor such as cousin > marriage? I heard that cousin marriage is legal in some parts of the US. it says: >So it was > thought that the cause might be genetic. However, the more closely related > they were, the less they were affected. It would seem in their case brother/sister marriage would be preferable to cousins?? I don't know much about the Amish but I would guess their genetic pool is not very extensive. Perhaps the pesticides are responsible. A pity they did not check maryse ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkins ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn