behavior/neurological
• by 3 weeks of age all homozygotes display a rear-leg high-stepping ataxia typical of hotfoot mutants, wherein the rear legs are each lifted higher than normal and placed down with a patting-like motion, and by approximately 2 weeks of age some homozygotes display a leaning, side-to-side gait
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growth/size/body
• by 2 weeks of age some homozygotes have a slightly smaller body size
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