Center for Infectious Disease Research 1 article published in JoVE Biology ODELAY: A Large-scale Method for Multi-parameter Quantification of Yeast Growth Thurston Herricks1, Fred D. Mast1,2, Song Li1, John D. Aitchison1,2 1Institute for Systems Biology, 2Center for Infectious Disease Research We present a method for quantifying growth phenotypes of individual yeast cells as they grow into colonies on solid media using time-lapse microscopy termed, One-cell Doubling Evaluation of Living Arrays of Yeast (ODELAY). Population heterogeneity of genetically identical cells growing into colonies can be directly observed and quantified.