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A calculation of relative recombination frequencies is shown on the Genetic Distance vs. Physical Distance Ratios display. The calculations are based on 2-point data available from SGD and the lengths of DNA sequences in the genome.
This display graphs the length of a chromosome along the x-axis (in kilobasepairs) and the ratio of centimorgans to kilobasepairs along the y-axis. Since the location in centimorgans is not known for every locus, intervals are graphed. For example, if marker A is 15 kilobasepairs away from its closest genetically mapped locus, marker B, there will be a 15 kilobasepair-long plateau with the cM/Kbp value that is calculated for that genetic interval.
Representative genetically mapped loci and their postions in cM are indicated at the top of the figure. The "Zoom In" bar lets you magnify the display region. After zooming in, blue arrows that point to the left or to the right of the figure allow you to scroll to the left or right along the chromosome. Note that there is no "zoom out" feature; to zoom out use the "back" button of your browser. The Genetic versus Physical Distance Ratio for chromosome I is shown below.
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