I had someone say that because Sherlock and Mycroft both have blue eyes, their parents had to both have blue eyes too because of genetics.
I have a brown-eyed parent and a blue-eyed parent and more than half of us kids are blue-eyed...and yes, we're all biologically related.
Patriarch
David Holmes had indeed given his looks to Mycroft, but John knew immediately where both the sons had gotten their wise eyes.
Anita was tucked beneath the arm of a very tall man with thick dark hair and a beaked nose, piercing blue eyes and a thin mouth. He had a very stern air about him, but John kept glancing back to the protective, tender hand lightly holding onto his wife's upper arm and knew there was a kind of gentility to him.
"John," said David Holmes, outstretching a hand. "It's good to meet the man who changed my son."
Prompt was from Javien Deluke and it was: wise.
David Holmes isn't actually the patriarch; he's just the man of the house :3