Depending on books in the cobbled together versions of the NT, you get different accounts of the saving of animals numbers. But you also get different accounts as to how many humans, regarding Noah's family, as the various versions claim, ended up surviving the alleged flood that the book claims.
But just taking into account the very small range in various claims of how many of Noah's family survived, it would still be a tiny genetic gene pool regardless.
But just taking into account the very small range in various claims of how many of Noah's family survived, it would still be a tiny genetic gene pool regardless.