The cells of the ICM are pluripotent stem cells that can give rise to all cell types of the three embryonic germ layers, i.e., ectoderm, mesoderm, and endoderm, and the germ cell lineage.
Rather than repairing genes, the scientists will be disrupting genes in normal, healthy embryos so that they can learn about embryonic ... human embryos or germ-line cells undergo gene editing ...