Then 14 are unneeded.
What they do in the Name of the Lord will be in a spirit of complete Unity.
Then 14 are unneeded.
One does not beget the other because you say it. The twelve hold the same keys as a body, because the keys are a necessary function needed when the Prophet dies and a new one is needed. The twelve are vested with the same authority as the Prophet for any circumstance requiring that authority.
The twelve will also include those who were part of the Presidency of the Prophet meaning there generally will be fourteen in the quorum of the Twelve Apostles at the time of choosing a new Prophet. As the Prophet has two counselors, the quorum of the twelve will be back to 12 once the new Presidency has been formed.