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Hello, co-emailers,
 
    anybody can tell me what are the genetic and social probabilities that the same sister of a male and homosexual fraternal twin will be also homosexual??? and what are the genetic and social probabilities that the sister of a homosexual male non-twin will be also homosexual???
 
more: what are the genetic and social probabilities that the brother of an homosexual female fraternal twin will be also homosexual??? and finally: what are the genetic and social probabilites that the brother of a homosexual female non-twin will be also homosexual???
 
    is there any sociologist especialist in gender that can satisfy my doubts???
 
    have you these probabilities for European population???
 
    Thanks in advance.
 
    Joan-Carles Ortega i Berenguer.