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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID 		fpw
fertile peewee
MGI:4358376
Summary 1 genotype
Jump to Allelic Composition Genetic Background Genotype ID
hm1
 		fpw/fpw involves: C3H/HeJ * C57BL/6J MGI:4358381


Genotype
MGI:4358381
hm1
Allelic
Composition		 fpw/fpw
Genetic
Background		 involves: C3H/HeJ * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
No mouse lines available in IMSR.
See publication links below for author information.
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
reproductive system

growth/size/body
postnatal growth retardation ( J:151726 )
• mice exhibit slow postnatal weight gain and lack the juvenile growth spurt observed in wild-type mice after weaning
slow postnatal weight gain ( J:151726 )

cellular
decreased cell proliferation ( J:151726 )
• proliferation of hepatocytes and spermatonogia is decreased compared to in wild-type mice
increased cell proliferation ( J:151726 )
• proliferation of chondrocytes is increased compared to in wild-type mice

liver/biliary system

skeleton
abnormal skeleton physiology ( J:151726 )
• chondrocyte proliferation is increased compared to in wild-type mice

homeostasis/metabolism

immune system




Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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Send questions and comments to User Support. 		last database update
09/30/2025
MGI 6.24 		The Jackson Laboratory