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Rump White - (Rw)
The rumpwhite (Rw) mutation causes a pigmentation defect in heterozygotes and embryonic lethality in homozygotes. At embryonic day 7.5, Rw/Rw embryos are retarded in growth and die around day 9.5. There is no harm to the mother from this and rumpwhite to rumpwhite matings are common practise by breeders of this variety.
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Rump White is any standard color having a white rump. The line of demarcation should be straight and encircle the body so that the lower third of the mouse, including the hind feet and tail, is completely white. The remaining color must be without any white markings at all and should conform to the standard laid down for that variety. (English, N.M.C.)
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Picture taken by MouseBreeder
One of the mice pictured went on to become an NMC single champion
The rumpwhite (Rw) mutation causes a pigmentation defect in heterozygotes and embryonic lethality in homozygotes. At embryonic day 7.5, Rw/Rw embryos are retarded in growth and die around day 9.5. There is no harm to the mother from this and rumpwhite to rumpwhite matings are common practise by breeders of this variety.
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Rump White is any standard color having a white rump. The line of demarcation should be straight and encircle the body so that the lower third of the mouse, including the hind feet and tail, is completely white. The remaining color must be without any white markings at all and should conform to the standard laid down for that variety. (English, N.M.C.)
Picture taken by MouseBreeder
One of the mice pictured went on to become an NMC single champion
