1 week: Embryos several days old have stem cells {embryonic stem cell, gestation}| (ES cell). Embryonic stem cells can uptake and insert genes by homologous recombination. Adding altered stem cells can change mice embryos. Mouse blastocysts have inner cell layer, which can culture with fibroblasts or with leukemia inhibiting factor to prevent further differentiation.
Biological Sciences>Zoology>Development>Stages>Gestation>Embryo 007 Day
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Date Modified: 2022.0224