mortality/aging
• most mutants die by P3 with only 8% surviving to 2 weeks and most of these dying before weaning
• decreasing litter sizes can increase mutant survival allowing some mutants to survive to adulthood
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behavior/neurological
• no milk is seen in mutant stomachs
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• mutants have a normal rooting reflex but an increased latency time for attachment to the nipple and more mutants fail to attach to the nipple
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growth/size/body
• mutants that survive to 2 weeks show a 70% reduction in body size
• adult mutants from litters that were decreased in size show decreased growth rates for the first 3 weeks of life but growth rates after weaning are similar to wild-type mic
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