mortality/aging
• arrest by E9.0
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embryo
• absent at E7.5 and E8.5
• lack cilia and basal bodies but have normal planar cell polarity in node cells
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• embryos show many pyknotic and fragmented nuclei
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• form a heart and neural tube but fail to undergo turning
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• by E9.0
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cellular
• absent at E7.5 and E8.5
• lack cilia and basal bodies but have normal planar cell polarity in node cells
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• disrupted organization of the centrosome in embryonic cells
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• at E8.5 a 70% increase in the fraction of mitotic cells is seen
• prometaphase is prolonged in embryonic cells and the formation of defined spindle poles is delayed; however, in every mitosis the chromosome rosette resolves into 2 equal groups of chromosomes
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• embryos show many pyknotic and fragmented nuclei
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