As explained in this eMedTV segment, a mutation in the F8 gene causes hemophilia A, while a mutation in the F9 gene is responsible for hemophilia B. This article covers these genes in more detail and discusses how hemophilia is inherited.
To forward a text message on an iPhone running the iOS 8 operating system, open the conversation thread, select an individual message and then use the Share feature to send the message to one or more of your contacts.
I've been searching for a way to transfer text messages from my iPhone to my computer without losing important meta information (date, time, etc.) and this app did great job for me. There is an option to print iphone texts too but that wasn't needed anyway. Forwarding iphone text messages to email is free but it strips out useful meta information.