Since no one appears to have sat John down and explained that his job was to shape the man Mike would later become, all we get out of the dumb bastard is boasting when commonalities are pointed out and an indulgent, baffled and disappointed chuckle when it's kind of obvious that the boy takes after the mother forced to interact with this strange child that (as far as John allows himself to see) appears to have just showed up one day and squatted in one of their rooms. This will bite him in his fat ass when it comes time to inter his urn because Mike will be the one eulogizing him. As I said before, he'll be sent off with honeyed words that do a bad job of disguising the intent of kicking the floor and yelling "Hot enough for you down there, you miserable old bastard? Not nearly hot enough for MY tastes!!"
Mike will have to watch that because the only parental figure he has is Elly and since he has the burden of being as helpless as his dad around the house to contend with, he's in danger of having his remains sold to a university to be dissected out of sheer pique.