vision/eye
• 5 of 6 E18.5 mutants show a bilateral persistent hyperplastic primary vitreous
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skeleton
• 46% of mutants exhibit skeletal malformations
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• 1 of 13 (8%) mutants exhibit a posterior tubercle on the basioccipital bone
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• 1 of 13 (8%) exhibit sternum malformations
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• 3 of 13 (23%) of mutants exhibit fusion of C1-AA with C2 dens
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• 2 of 13 (15%) mutants exhibit a bifid C2
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craniofacial
• 1 of 13 (8%) mutants exhibit a posterior tubercle on the basioccipital bone
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