Figure 7.

Rrh maps in the distal region of mouse chromosome 3. Rrh was placed on mouse chromosome 3 by interspecific backcross analysis. Segregation patterns of Rrh and flanking genes in 180 backcross animals that were typed for all loci are shown at the top. For individual pairs of loci, more than 180 animals were typed (see text). Each column represents the chromosome identified in the backcross progeny that was inherited from the (C57BL/6J × M. spretus) F1 parent. Solid boxes represent the presence of a C57BL/6J allele and open boxes represent the presence of a M. spretus allele. The number of offspring inheriting each type of chromosome is listed at the bottom of each column. A partial chromosome 3 linkage map showing the location of Rrh in relation to linked genes is shown at right. Recombination distances between loci, in centimorgans, are shown to the left of the chromosome and the positions of loci in human chromosomes, where known, are shown to the right. References for the human map positions of loci cited in this study can be obtained from the Genome Data Base, a computerized database of human linkage information maintained by The William H. Welch Medical Library of The Johns Hopkins University (Baltimore).