Board Thread:General Discussion/@comment-65.96.57.229-20130711024718/@comment-124.171.155.254-20180718000140

https://www.reddit.com/r/teslore/comments/16mfwp/if_a_dragonborn_has_a_child_is_the_child/

check out this Reddit post, I didn't bother to read all of it but it says that it's possible that the imperials saying that being dragonborn is hereditary could be propaganda or that the emperor dragonborns can wear the crown and hero dragonborns can master the thu'um naturally