Looks like a ball but the photo is not close enough for 100% confirmation. Let it go a couple of days and you will know for sure.
Your photos weak sauce homie nobody can comfortably tell you yes or no without a close up that's a no brainier but you'll know if there balls they'll get a shit ton in just afew days Sent from my XT1585 using Tapatalk
Have you flipped to flower? Its very easy to tell after 1 week of 12/12. The strains i have now its almost impossible for me to tell before flower