If you haven't done that, well you can assign old flights to the account but not really old ones. Anything older than 2 weeks will probably not be accounted for and you won't be able to get miles from those flights into the account.
The Human Genome Project was started in 1990 with the goal of sequencing and identifying all three billion chemical units in the human genetic instruction set, finding the genetic roots of disease and then developing treatments. It is considered a megaproject because the human genome has approximately 3.3 billion base-pairs.
Just as the Human Genome Project revolved around two key principles, it also started with two early goals: (1) building genetic and physical maps of the human and mouse genomes, and (2) sequencing the smaller yeast and worm genomes as a test run for sequencing the larger, more complex human genome (IHGSC, 2001).