Magical bloodlines? That's very different from how it works in my own universe. I wonder if the gene for it is dominant or recessive...or perhaps a collection of otherwise ordinary genes that create magical potential in certain combinations? It would make it more likely to be passed down if single genetic markers varying between parent and child wasn't enough to completely destroy magical potential...

[His wings are flapping idly, the way one might tap a foot while thinking. After a moment, though, he blinks and rubs the back of his head.]

Ah, my apologies. I didn't mean to ramble.