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?.
When it's an open question, then what is correct: I hear you're going to London. What date are you planning to leave? When it's a choice of a limited number of dates, then which is correct: I hear you're visiting foreign capitals on May 1, July 4, and July 14.