growth/size/body
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• homozygotes are approximately 25% smaller than normal by 1 to 3 weeks of age
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behavior/neurological
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• when lifted by the tail homozygotes do not splay their hind legs but instead clasp them closer to their body, and this phenotype has variable expressivity
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skeleton
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• histology of one male at 22 weeks of age found thinner than normal growth plates of the tibia and femur and the columns of chondrocytes were somewhat disorganized
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