Who does he look like?

We were sitting at the dinner table when John said:

"He doesn't really look like me anymore"
"Yes he does"
"Well, he does, but he doesn't look like my clone anymore.  I mean, you don't look at him and think that I just proceated with myself to produce my exact replica.  He's definately got someone else's genes"
"Ahem." I say, pointing at myself
"No, he doesn't look like you. He looks like he's got someone else's DNA other than mine, I just can't place who"
"I incubated him. I gave birth to him. He came out of MY vagina.  He looks like me.  ME ME ME!"
"No, that's not it."