I chose this video because it explains it so well. Another reason that i chose this video is because of the visual examples. In the other video there is a example but this one i like better because they use the Lego and use them as a chromosomes.
This video explains how down syndrome happens that even a 6th or 5th grader could understand. I chose this video because it was easy to understand and not at a doctors level.
In this article it talks about what causes it and how it happens. Down Syndrome is caused by when 1 parent passes 2 chromosomes instead of just 1. But there is only on chromosome that it can occur in is chromosome 21. So when one parent passes passes both chromosomes from 21 and the other parent passes one just like normal or like its supposed to be that causes Down Syndrome. I chose this website is because it is a very reliable resource because it is a huge Clinic/hospital