Blastomeres

... partners that regulate asymmetric division and that the relative abundance of Hsp70A in asymmetrically dividing embryos may determine which blastomeres divide asymmetrically and which do not." http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&dopt=Abstract&db=PubMed&list_uids=16168403 ...

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I know at about four days after fertilization the group of basically autonomous blastomeres suddenly becomes interconnected chemically and physically by "compacting". My question is, does anyone know what triggers this? I know there are genes being turned on and ...

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