DNA Recording System Traces Mouse Embryo Development from Two Cells to Organs

Using a novel DNA recording system, researchers mapped the lineage of every cell in a mouse embryo from the two‑cell stage through organ formation. The technology captures the genetic “family tree” of individual cells, revealing that distinct cell types arise according to their own developmental timelines. By charting when and how each cell differentiates, the study offers a detailed blueprint of normal embryogenesis. This insight could illuminate the cellular origins of birth defects, genetic disorders, and cancer, potentially guiding future diagnostics and therapies.