Lamarck believed that acquired traits would be passed on to the next generation.
Your arbitration hearing will result in a decision (arbitration award) issued by the arbitrator(s) within 30 days of the hearing. The arbitration award will be final and binding on both you and your attorney, unless either of you seeks a trial de novo within 30 days.
Typically it takes 30 to 60 days from contract to settlement in the DC area. There are many reasons that settlement could be delayed including financing issues, appraisal issues, Home inspection issues, title issues,etc. Typically it takes 30-60 days to go from contract to closing.