I read this book in middle or junior high school in the early 2000s. I don't recall the exact circumstances that led to these teens being on this planet, but there were an even number of them (I don't remember the exact number), half boys and half girls, and there was some sort of AI involved. I think the AI was housed in a derelict ship of some sort(?) and I think the main character could communicate with the AI remotely somehow, via telepathy or nanomachines or whatever.
The planet was habitable but seemingly uninhabited by intelligent life, and the AI paired off the kids to populate the planet based on whatever combination it decided was genetically optimal for that goal.
Two of the boys were the main character and his brother, and the brother was paraplegic. The girl that was paired with him had misgivings about it initially before eventually warming up to him.
I have a feeling this book is from a series, but if it is, this was the only book I read from it.
(edit) Some additional details:
- I read it in the early 2000s but I don't know when it was actually published, could have been earlier.
- It was a hard cover book; the art had a jungle/forest-y scene on the front.
- I have a feeling the title was only 1 or 2 words long, possibly the name they gave to the planet?