The result of this union will be a cell with three copies of chromosome 21. Recall again that we've only been considering chromosome 21 so far. Chromosome nondisjunction is generally rare, so the new cell probably has two copies of all of the other 22 chromosomes, just as it should.
When is Mother's Day 2017? Mother's Day 2017 is on Sunday, May 14, 2017 (in 270 days). Mother's Day 2016 has already passed - it was on Sunday, May 8, 2016, 101 days ago.
Parents Day falls on the fourth Sunday of every July. This year Parents Day is July 27th, 2016. Find out how to celebrate Parents Day! Parents Day is on the 4th Sunday of July. Parents Day has officially been a national holiday since 1994, and is all about family (no matter what faith or background you come from).