Evidence for mitotic recombination in Wei/+ heterozygous mice. (original) (raw)
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J J Panthier, J L Guénet, H Condamine, F Jacob, Evidence for mitotic recombination in Wei/+ heterozygous mice., Genetics, Volume 125, Issue 1, 1 May 1990, Pages 175–182, https://doi.org/10.1093/genetics/125.1.175
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Abstract
A number of alleles at coat color loci of the house mouse give rise to areas of wild-type pigmentation on the coats of otherwise mutant animals. Such unstable alleles include both recessive and dominant mutations. Among the latter are several alleles at the W locus. In this report, phenotypic reversions of the Wei allele at the W locus were studied Mice heterozygous in repulsion for both Wei and buff (bf) [i.e. Wei+/+bf] were examined for the occurrence of phenotypic reversion events. Buff (bf) is a recessive mutation, which lies 21 cM from W on the telomeric side of chromosome 5 and is responsible for the khaki colored coat of nonagouti buff homozygotes (a/a; bf/bf). Two kinds of fully pigmented reversion spots were recovered on the coats of a/a; Wei+/+bf mice: either solid black or khaki colored. Furthermore phenotypic reversions of Wei/+ were enhanced significantly following X-irradiation of 9.25-day-old Wei/+ embryos (P less than 0.04). These observations are consistent with the suggestion of a role for mitotic recombination in the origin of these phenotypic reversions. In addition these results rise the intriguing possibility that some W mutations may enhance mitotic recombination in the house mouse.
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© Genetics 1990
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