Subject: Simian crease and hereditiy

I have a Simian Crease in my left hand and my 5 year old son and 3 year old 
daughter have the same in their left hands.  All three of us seem normal, 
mentally and physically.  Is there anything physically that I should watch 
for?  Also, neither of my biological parents have a Simian Crease.  I suspect 
that perhaps the man I've thought of as father may not be my biological 
father, as one parent has light grey eyes, the other has pale blue eyes, and 
mine are dark brown.  What do you think?

Re: Simian crease and hereditiy