hi i have a friend that lost her gran in january who had alzheimers , my friend has discussed there worries with me & i belive they are convinced that there fait is to end up with alzheimers & they are very frightened of the thought & of the same ending as there gran , im asking realy the chances or likelyhood of this happening , i have rearched the internet but it seems very unclear or specific to how the jeans work from from parents to children , your advice & guidence would be very comforting to me ,