There is all this variety in their behavior, shape, and influence on our biology, yet they have only 37 genes? How many nuclear genes augment these 37 to make a

There is all this variety in their behavior, shape, and influence on our biology, yet they have only 37 genes? How many nuclear genes augment these 37 to make all of this possible? Do any of these genes encode for the ribosome proteins necessary to convert the remaining genes into proteins? What guides the behavior of a mitochondrion utterly lacking mtDNA? I suppose they still contain the proteins these genes code for, so maybe the genes are needed only for repair and reproduction.