Underdeveloped Sprout

So I have a Green Crack sprout who still had it's cask attached after sprout so I popped off with my fingernails and there's just a yellow ball anyone have anything input on this.

survival of the fittest.

it is because the seed casing may have been on it too long...Seeds come stock with enough energy for the plant to make it to the surface and put down enough roots to make some true leaves, and then the seedling is done...so if the casing stays on too long, which sometimes happens if you plant the seed too shallow, the plant will still look for the light, but can't actually get to it...you have seen grass that is covered by something for a few days, then grass in the dark starts to go all yellow, because it isn't getting any light, but if you remove whatever was on the grass that is now yellow it will green back up as it gets more sun...and this seedling is the same way...it got a little light starved, but now that the casing is gone the leaves wil green up...so no worries.

Yeah that's what I assumed it's more that when should I expect growth it's been since yesterday and this yellowing still hasn't gone through photosynthesis its still all yellow.

As missnu said plant your seed a little deeper next time and also if you put the light too close to the soil with the seed in it, it can dry up the soil on top ending up in the soil not pushing off the shell and the shell drys up over the cotyledons. So deeper/keep it moist.

Should I just wait or put it down?

don't kill it. Never underestimate a marijuana plant. They call it weed for a reason. They tend to bounce back if they aren't completely dead.

Leave it. Nothing to lose.