21 phenotypes from 1 allele in 2 genetic backgrounds

Allelic Composition Genetic Background	Annotated Term	Reference
Rf/Rf+ either: (involves: 129/RrSv * A/J) or (involves: 129/RrSv * SWV)	exencephaly	J:6443
Rf/Rf+ involves: 129/RrSv	abnormal rib development	J:278
	abnormal vertebral arch morphology	J:278
	abnormal vertebral body morphology	J:278
	abnormal vertebral column morphology	J:278
	female infertility	J:278
	fusion of vertebral arches	J:278
	fusion of vertebral bodies	J:278
	hemivertebra	J:278
	kinked tail	J:278
	rib fusion	J:278
Rf/Rf involves: 129/RrSv	abnormal axial skeleton morphology	J:278
	abnormal embryonic tissue morphology	J:278
	abnormal neural plate morphology	J:278
	abnormal tail length	J:278
	abnormal vertebral column morphology	J:278
	absent somites	J:278
	absent tail	J:278
	decreased birth body size	J:278
	embryonic growth retardation	J:278
	exencephaly	J:278
	perinatal lethality, complete penetrance	J:278
	vestigial tail	J:278