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.
You can restore SMS form your iTunes Backupn back to your iPhone or a new iPhone if you once backed up your iPhone data with your iTunes library. Check this tutorial: http://www.backuptrans.com/tutorial/how-to-transfer-sms-from-itunes-backup-to-iphone.html.