The Quality Scores track shows the sequencing quality score of each base in the assembly. The height at each position of the track indicates the quality of the base. When zoomed out to a large range, the heights reflect the averaged scores.
This track may be configured in a variety of ways to highlight different aspects of the displayed information. Click the Graph configuration help link for an explanation of the configuration options.
The quality scores were provided as part of the $organism assembly. The database representation and graphical display code were written by Hiram Clawson.