nondisjunction - meiosis in which there is a failure of paired homologous chromosomes to separate; results in an abnormal number of chromosomes in the daughter cells.
What Date? is a simple, freeware date calculator for Windows. Enter a date and interval and press calculate to find any date in the future or past. What Date will recognize any date format which Windows can understand (date formats as set in Control Panel). I wrote this because many people emailed asking; Is there a simple way to find a date given a start date and interval?.
March 1st was the date specified by Congress in 1913, after the passage of the 16th amendment. In 1918 Congress pushed the date forward to March 15th, where it remained until the tax overhaul of 1954, when the date was again moved ahead to April 15th.