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. 2015 Mar 18;16(1):91. doi: 10.1186/s12859-015-0505-4

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© Baron et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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An example of the marker look up process. The tan lines show a request for a specific marker. Next, the yellow lines show a request for markers by chromosome range. Finally, the green lines illustrate how the marker name and position can change. The 0/0 genotype in line 1 of Part D represents the missing genotype. The [ ] brackets in Part F point out the 6th and 7th genotype on line 2 and 500th genotype on line n; the brackets are not part of the genotype data.