The bottleneck might not be able to be traced any further back than Noah and those 6 other people. From those 4 groups the settlement of the earth started, scripture also says which ones went in which direction. If the whole earth was flooded then it might be taken that the giants and evil men had gotten into those lands also. If it was a local problem a local flood would have sufficed.
We might be inferior than when we were back then. If Noah was still perfect in his generations any unwanted changes can probably be rectified during resurrection or at the river of life. 3 or 4 generations are all that is needed to stop mutations. If you look at special breeds of dogs today the closer they are to being 'pure' the closer they are to being 'mentally unbalanced' or more prone to very mutated babies (which don't survive). A heinz57 is a more 'stable' dog when it comes to being a companion to a human and it probably also makes a difference in a pack setting.
We might be inferior than when we were back then. If Noah was still perfect in his generations any unwanted changes can probably be rectified during resurrection or at the river of life. 3 or 4 generations are all that is needed to stop mutations. If you look at special breeds of dogs today the closer they are to being 'pure' the closer they are to being 'mentally unbalanced' or more prone to very mutated babies (which don't survive). A heinz57 is a more 'stable' dog when it comes to being a companion to a human and it probably also makes a difference in a pack setting.