We find out the rest of the Neutrons hates Jimmy because of his inventions that go wrong.
One of Jimmy's Cousins (Just the one who doesn't look like Hugh) it's a "3D" version of John A. Davis, Jimmy's creators.
This is the first time we see Sheen, Carl and Jimmy enter Cindy's room.
We find out that Jimmy is not the only Neutron that was born with the Neutron Genius Gene.
We meet the rest of Jimmy's family.
While walking down the sidewalk, coming from Cindy's house, the invention that was in Jimmy's hand disappears. When the alien arrives to get her baby from Carl the invention appears in his hand again.
Sheen: (while looking at the alien specimen on the tv monitor) Hey Jimmy! Does that dot right there mean that it's a boy alien?
Jimmy: Knock it off! (pulls Sheen away from the monitor)
Carl: Jimmy, your aunt is nice. Is she seeing anyone?
Jimmy: Hopefully a psychiatrist.
Aunt Amanda: Too bad your granny couldn't be here to see this...
(everybody lowers their heads as funeral music plays)
Aunt Amanda: ... but she's in Reno, kicking butt at the slots!
(everybody laughs and jumps for joy)
Cousin Annabelle: (scared) Or pants! Horrible walking pants!!
(after Jimmy leaves Cindy's room, angry)
Carl: (calm) Boy, he's in a bad mood, huh? (angry, screaming) He's just jealous because I'm getting all the attention! (calm again) Whatever games do ya have?
Carl: Uh, Jimmy? Are you sure I can't look at it?
Jimmy: Uh...Sorry, Carl. I don't have any mirrors.
Carl: Well, that's not true. You have lots of mirrors. (tries to look to his left into a small standing mirror trying to see the 'alien' that is attached to his face, but is still unable to see himself)
Jimmy: Nope. Nope, I don't. Now be quiet Carl. I'm working on getting it off your face.
Sheen: (to his UltraLord when he finds it behind a rock) HA! There you are. From now on you're coming into the bathroom with me. I don't care how embarrassed you are!!
Sheen: Don't worry, Jimmy. I know right where I left my UltraLord last week while I was using the facilities.
Carl: Why couldn't you just buy a replacement UltraLord, Sheen?
Also, Keith Alcorn said that there were some things, when Carl was giving birth to his alien baby, that had to be cutted due to being to strong to watch.
This episode was supposed to air on Wednesday, May 25, 2005, but it didn't. Instead, Nickelodeon re-aired "Lights, Camera, Danger!". According to Keith Alcorn, they told him the reason was a "computer glitch"
Keith Alcorn said that 'Who's Your Mommy" was his favorite episode that he did not direct.
Mother & baby jellyfish:
The jellyfishes are similar to the ones shown on Spongebob Squarepants
Cousin Annabelle: Or horrible walking pants!
This may be an allusion to the very first episode of Jimmy Neutron, When Pants Attack
The mother Jellyfish resembles a lot like the Schpizoa from Code Lyoko series.
Title: Who's Your Mommy
This is a parody of the movie title Who's Your Daddy?
Title: Clash of the Cousins
The title is taken from the movie Clash of the Titans.
Carl: (getting infected with a face-hugging parasite)
Carl acquiring a face-hugger is a reference to the fate of Kane in the movie Alien.
Cousin Eddie's Room: Appearance
Cousin Eddie's room looks a lot like the kitchen from the movie Who Frammed Roger Rabbit.