Fig 1.
(A) Illustration of the tree distribution for a growing population of cells, terminated at a time-point t. We note that the tree distribution includes not just the generation times of “branch” cells whose cell cycles have finished at t, but also those “leaf” cells that are born before t but will complete their cell cycle after time t. A single lineage is shown in orange. Each node corresponds to a single cell division event. (B) Illustration of differences in cell size control policy. (C) Illustration of asymmetric division in different growth morphologies. Budding cells set the plane of division early on in the cell cycle and direct growth to a newly forming bud beyond that division plane. In contrast, non-budding cells set the plane of division when division occurs, meaning that growth throughout the cell cycle affects both progeny. The min and max conditions for budding cell size at birth are related to the observation that in a budding morphology, mother cells will only ever increase in size over subsequent cell cycles (see main text for details). In the expression for volume at division Vd, η represents time-additive noise in the timing of cell division.