mortality/aging
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• mice have reduced viability
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growth/size/body
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• usually smaller than wild-type
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cardiovascular system
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• 85% of mutants display aortic aneurysms (S-shaped or saccular involving the thoracic and abdominal aorta and its branches)
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pigmentation
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• homozygous mice are light-colored all over
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reproductive system
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• many homozygotes are sterile
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limbs/digits/tail
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• occasionally hindlimbs are deformed
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integument
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• homozygous mice are light-colored all over
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• whiskers are curly at birth but straighten by weaning age
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