1. This project had 2 original data sets -- the first one had 20 chromosomes and 91 SNP markers, the 2nd one was the data of chromosome 2 with 8 new markers. Five problematic markers were identified and removed from data set 1 before analysis and 86 markers were left. The cleaned data set 1 and data set 2 were merged as one file. The map of the new file is updated with Build37 Cox genetic map (B37) and it is saved as "Sheehan2007_B6xDBA2_B37_Data.csv". This file is ready to be read into Rqtl; 2. Generate a description file of the project, it includes the general information, definitions of the phenotypes, description of the genotypes and information of the missing markers; 3. For the genotypes of this cross: (cM=centimorgan, bp=basepair) (1) The markers of this cross is a mixture between SNP and MIT markers. The bp position of marker "D2MIT17" was missed in both Cox map and MGI. Primer sequences found in MGI, but their locations don't match the result from primer-BLAST in NCBI. We could not identify the B37 bp position of this marker currently (the letters are highlighted with pink color in description file); (2) Correct the spelling errors of some marker names and saved the changes in B37 data file; 4. For the phenotypes of the cross: No problem was detected in phenotypes; 5. Except the "csv" file mentioned above, save the description file, original data, data with B37 map, data process record and the list of missing markers together as a big excel file ("Data_Description_B6xDBA2_Sheehan2007.xlsx"). (first curating work is finished at 6/10/2009, files are updated at 7/7/2009, 2/3/2011) 6. Information were updated on 5/25/2012: Change the name of the map (from "Shifman" to "Cox" map) in description and readme file, add a map reference in description file.