I'm sure this has been covered somewhere most likely. What is the process of forming a new Chapter? I'm under the impression that gene-seed is grown within space marines and kept by the mechanicus to be used when a new chapter is commissioned by the Inquisition or Imperium.
Can it be taken directly from existing troops in said chapter the gene-seed belongs to?
Who trains the new chapter or initiates??
Have there been instances of a company or squad from a successful chapter forming the nucleus for a newly commissioned founding(aside from the second founding)? I vaguely remember something about a chapter dissolving and folding into another.