Assertion: hemophilia's gene | /r/HasProperty | passed down female line
Facets:
value: without a haemophiliac son
type: OTHER
Source sentences:
text: The gene can be passed down the female line without a haemophiliac son being born, but as the family line continues and no haemophiliac sons are born, it becomes less likely that a certain ancestor had the gene and passed it on through the female line.