Originally Posted by XeniaCasaraghi
Still have a hard time with the idea that inbreeding can cause a humongous jawline/chin.
Technically, inbreeding does not itself cause any malady/deformity. If the gene/genes that cause a malady are from a mutation, and then that mutation is reinforced by affected family members marrying each other exponentially. There were many 1st cousin marriages and many uncle/niece marriages for centuries within this family. People closely related, such as 1st cousins or uncle/niece, have a greater chance of carrying the same "bad" genes (whatever that may be) and consequently their offspring have a greater chance of being adversely affected. The last Hasburg king of Spain was so inbreed, his entire body was was riddled with many deformities - it was noted he had one small black testicle and infertile, his blood was almost blackish in color, he could barely chew or talk and constantly drooled, and was very childlike, even though has was married twice; both of his wives were repulsed by the site of him. He was emotionally distraught when his 1st wife died, and he himself was 30 yo when he passed away. FYI -he had a full blooded sister who was NOT affected at all from the extensive inbreeding of the Spanish Hasburgs - she was very lucky. 🏰👑