By trading up for the No. 3 pick, the San Francisco 49ers made it a virtual certainty that three quarterbacks will go in the first three selections of this year’s NFL draft.

But which passer do the 49ers plan on drafting? And could the Atlanta Falcons or another team make history by selecting a fourth quarterback with the fourth pick? Those are just a few of our biggest draft questions with three weeks to go before the first round gets underway.

Are the 49ers really going to take Alabama quarterback Mac Jones with the No. 3 pick?

The more you hear out of the Bay Area, the more it sounds as if the 49ers favor Alabama’s Mac Jones over North Dakota State’s Trey Lance or Ohio State’s Justin Fields. It’s a surprise in some ways, including the fact that Jones is the least athletic of the five quarterbacks expected to go in the first round.

But Jones checks a lot of boxes for what Coach Kyle Shanahan likes in a quarterback. He’s smart. He’s accurate. Shanahan likes quarterbacks who know what to do in down-and-distance situations, and that’s Jones’s strength.

Last year, Shanahan expressed his admiration for the way the Kansas City Chiefs developed Patrick Mahomes for a year behind then-starter Alex Smith in 2017. That’s why Lance, who is more of a developmental prospect but has impressive physical gifts, would make sense as the choice. But San Francisco also could have Jones develop for a year behind Jimmy Garoppolo. The only way Garoppolo won’t be a 49er is if a team offers a first-round pick for him. Even for a potentially interested team such as the New England Patriots, that’s a steep cost.

Will a quarterback be drafted with the fourth pick?

Clemson’s Trevor Lawrence is a lock to go to the Jacksonville Jaguars with the first selection, and the New York Jets’ trade of Sam Darnold to the Carolina Panthers ensured they will draft a quarterback at No. 2. It appears that will be BYU’s Zach Wilson.

If the 49ers take Jones, then the draft’s intrigue will begin with the Atlanta Falcons with the fourth pick. They could take Fields or Lance, but the problem with drafting a quarterback is that financially they are locked in with Matt Ryan for the next two years. If they opt for a different path, Oregon offensive tackle Penei Sewell or Florida tight end Kyle Pitts would make sense, but could owner Arthur Blank get involved and push for Fields?

Teams interested in Fields or Lance could trade up to draft one with the fourth pick, but at this point it seems more likely that Atlanta will stay put.

Where will Fields and Lance end up?

The Detroit Lions could take one of the remaining quarterbacks at No. 7. The same is true of the Denver Broncos at No. 9, and both are candidates to trade up, although the Broncos are looking for more of a veteran to challenge Drew Lock. Don’t count out the Patriots trading up from the 15th pick, either.

How many defensive players will be drafted in the first 12 picks?

Without question, this draft will be dominated early by offensive selections. Normally, the split between offense and defense is closer to 50-50, but that won’t be the case this year. There might be only one safety, one defensive tackle, three or four edge rushers, two or three linebackers and four cornerbacks with first-round grades.

Combine that with the fact that there are top prospects at premium positions such as quarterback, wide receiver and offensive tackle, and there could be as few as two defensive players taken in the first 12 picks.

Will there be more trades than normal early in the draft?

Given how many good offensive players are in this draft, teams might be more willing to trade down to get more picks. Take offensive tackle: Sewell is clearly the best, but there are several good players in the next tier in Rashawn Slater from Northwestern, Alijah Vera-Tucker from USC and Christian Darrisaw from Virginia Tech.

Pitts, who might be the best pass-catcher in the draft, and LSU wide receiver Ja’Marr Chase should go in the top six, but teams looking to draft receivers might move down, knowing good ones could drop out of the first round. It’s a good, deep draft for wideouts.

Will there be more trades than normal late in the draft, too?

Expect more teams to try to trade out of this year’s draft to get choices for next year. That should start in the fourth round, if not sooner. This is an unusual draft. There was no scouting combine. General managers and scouts could only go to college workouts to see prospects, with no workouts at team facilities. Many college seasons were shortened, and as many as seven players who opted out of last season because of the pandemic could go in the first round.

Given the uncertainty, many general managers could decide they would rather have more picks next year.

What teams are positioned to do well this draft?

The Dolphins and Jets have the best opportunities to improve. The Dolphins have eight picks (including two in the first round), four in the top 50 and five in the top 81. The Jets have 10 picks, including two in the first round and five in the top 86. The AFC East is going to get interesting.

What will the Panthers do after trading for Darnold?

Had they not traded for Darnold, they probably would have drafted a quarterback. (Their pursuit of Deshaun Watson appears to be on hold for now.) While drafting a passer is still a possibility, it seems more likely that the Panthers will look at an offensive lineman, a wide receiver or maybe a cornerback. They also could trade back and add more picks, but if they stay at No. 8, they should have some very good players fall to them.