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.
When is Mother's Day. Mother's Day 2016 is on May 8, Sunday. Mothers Day is celebrated in several country across the globe though the month and date on which Mother's Day is celebrated in different countries varies. Most countries celebrate Mothers Day on second Sunday in the Month of May. This Mother's Day date was declared by US President Woodrow Wilson on May 8, 1914 when he signed a Joint Resolution designating the second Sunday in May as Mother's Day.