Phenotypes associated with this allele

• Allele Symbol: Npr2^pwe
• Allele Name: peewee
• Allele ID: MGI:4358115
• Summary: 3 genotypes

Jump to	Allelic Composition	Genetic Background	Genotype ID
hm1	Npr2^pwe/Npr2^pwe	involves: C3H/HeJ * C57BL/6 * CAST * NAW/WI	MGI:5444014
hm2	Npr2^pwe/Npr2^pwe	involves: C3H/HeJ * C57BL/6 * NAW/WI	MGI:5443996
ot3	Npr2^pwe/?	Not Specified	MGI:4366537

Genotype
MGI:5444014

hm1

• Allelic Composition: Npr2^pwe/Npr2^pwe
• Genetic Background: involves: C3H/HeJ * C57BL/6 * CAST * NAW/WI

• ♀: phenotype observed in females
• ♂: phenotype observed in males
• N: normal phenotype

mortality/aging

mortality/aging ( J:188839 )

N • Background Sensitivity: number of homozygotes produced from a heterozygote x heterozygote mating matches the expected Mendelian ratio

Genotype
MGI:5443996

hm2

• Allelic Composition: Npr2^pwe/Npr2^pwe
• Genetic Background: involves: C3H/HeJ * C57BL/6 * NAW/WI

mortality/aging

decreased survivor rate ( J:188839 )

• Background Sensitivity: number of homozygotes produced from a heterozygote x heterozygote mating is less than the expected Mendelian ratio (12% vs. 25%)

growth/size/body

short snout ( J:188839 )

decreased body weight ( J:188839 )

• weight is 54% of controls

decreased body length ( J:188839 )

• crown-rump length is 77% of controls

disproportionate dwarf ( J:188839 )

• dwarfism is evident by 2 weeks of age

postnatal growth retardation ( J:188839 )

limbs/digits/tail

short humerus ( J:188839 )

short femur ( J:188839 )

craniofacial

domed cranium ( J:188839 )

malocclusion ( J:188839 )

• malocculusion is frequent, but not completely penetrant

short snout ( J:188839 )

reproductive system

abnormal oogenesis ( J:188839 )

• oocytes progress prematurely through meiosis

• all oocytes examined underwent premature germinal vesicle breakdown (GVBD)

• following ovulation, oocytes undergo fragmentation

delayed vaginal opening ( J:188839 )

• vaginal opening occurs at P33-P84

female infertility ( J:188839 )

reduced male fertility ( J:188839 )

• males are sub-fertile, however, there are no obvious abnormalities in penian bone or testes histology

skeleton

domed cranium ( J:188839 )

malocclusion ( J:188839 )

• malocculusion is frequent, but not completely penetrant

short humerus ( J:188839 )

short femur ( J:188839 )

abnormal long bone epiphyseal plate morphology ( J:188839 )

abnormal long bone epiphyseal plate proliferative zone ( J:188839 )

• reduction in height of proliferative zone of the tibial growth plate

abnormal long bone hypertrophic chondrocyte zone ( J:188839 )

• reduction in height of hypertrophic zone of the tibial growth plate

abnormal cervical atlas morphology ( J:188839 )

• C2 vertebrae have a notch on the dorsal side

abnormal endochondral bone ossification ( J:188839 )

• bones formed through endochrondral ossification are reduced in length, however there is no reduction in the width of the skull, femur or ribs

Mouse Models of Human Disease		OMIM ID	Ref(s)
Acromesomelic Dysplasia, Maroteaux Type; AMDM		602875	J:188839

Genotype
MGI:4366537

ot3

• Allelic Composition: Npr2^pwe/?
• Genetic Background: Not Specified

phenotype not analyzed

no phenotypic analysis ( J:105913 )