Is Being Gay Hereditary/Genetic?

[Paluka]

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Are there any animals known to be gay? Like prefer gay sex over hetero sex? I know some animals such as Rams and Wolves mount each other, but that can be explained with social status and stuff. Alpha male exerting his dominance and all that jazz.

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At the central park zoo in NYC there are 3 homosexual penguin monogamous couples. 2 Female/Female and 1 Male/Male.