Is stubborness genetic?

We went for our 4D ultrasound yesterday. It was so neat to see the little guy. Of course, being my child, he was stubborn as ever! He is already head down, and I mean way down!! Love all that pressure and it's only going to get worse as he grows! Apparently, my placenta is like a down feather pillow because he was face up against it almost the entire time. Normally he kicks the crap out of me, but, for this special occassion, he decided to stay put and take a nap (mental note, 12:30ish-nap time once you're out!). The ultrasound tech also said because I am so small and haven't gained alot of weight, he is kinda smushed in there--sorry kidd-o! We did get some good pics (I'll have Jason update the rest soon), looks just like mommy when I was a baby! Chubby, chubby, chubby, especially his cheeks. He's obviously hogging all the food I eat! Can't wait to meet him and that wonderful personality he has already aquired!