Nimitz class aircraft carrier design. The more recent Nimitz Class carriers (CVN72-CVN76) have a displacement of 102,000t when fully loaded. They have a length of 317m and beam of 40.8m.
Each of these daughter cells has to contain 23 chromosomes, half of the original 46. Again these steps must occur in this exact order or the resulting cells will have an incorrect number of chromosomes.  It has probably become obvious at this point that mitosis and meiosis are not simple processes.
During cell division, the number 21 chromosome somehow breaks. A piece of the 21 chromosome then becomes attached to another chromosome. Each cell still has 46 chromosomes, but the extra piece of chromosome 21 results in the signs and symptoms of Down syndrome.