So this is the same original chromosome that we begin with. Now let's move on to deletion. So deletion is relatively simple. What happens is, in deletion, our detached segment, once it breaks off, it basically moves away and it does not reattach itself onto that original chromosome. So if the detached fragment of DNA does not reattach itself onto that original chromosome, this is known as a deletion with respect to that original chromosome. Now, what about duplication?