Whole-arm reciprocal translocation (WART) between Robertsonian chromosomes: finding of a Robertsonian heterozygous mouse with karyotype derived through WARTs.
The karyotype of a mouse trapped in a hybrid zone between a Robertsonian (Rb) population (2n = 22) and a population with the standard karyotype (2n = 40-alltelocentrics) shows two Rb chromosomes with new arm compositions. We suggest that whole-arm reciprocal translocations between Rb chromosomes gave rise to the new chromosome constitution and that such events can greatly help in understanding house mouse karyotype diversification and chromosomal speciation.
Capanna
E
E
Dipartimento di Biologia Animale e dell'Uomo, Università di Roma La Sapienza, Italy.
Redi
C A
CA
D000818:Animals; D000835:Animals, Wild / Q000235:genetics*; D002678:Chimera / Q000235:genetics*; D002871:Chromosome Banding; D004171:Diploidy; D006579:Heterozygote; D007621:Karyotyping; D008297:Male; D008540:Meiosis; D009115:Muridae / Q000235:genetics*; D014178:Translocation, Genetic