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.
Mother's Day in Latvia was celebrated for the first time in 1922. Since 1934, Mother's Day is celebrated on the second Sunday of May. After the end of the soviet occupation of Baltic states celebration was resumed in 1992. Mothers are also honored on International Women's Day.