embryo
• the neural tube and brain fail to fuse dorsally unlike in wild-type mice
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• mice exhibit disorganized somites compared with wild-type mice
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• mice exhibit small somites compared with wild-type mice
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nervous system
• the neural tube and brain fail to fuse dorsally unlike in wild-type mice
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• development anterior to the midbrain is arrested
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skeleton
• mice lack sclerotome compared with wild-type mice
• however, cell death and proliferation is normal
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limbs/digits/tail
growth/size/body
• mice exhibit abnormal head development compared with wild-type mice
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