First of all I’d like to tell you that I’ve loved all of your posts! They’ve helped me tremendously and I re-read them quite often. I was reviewing Segments: Bottoms-Up and have been trying to break down my chromosomes into these segments. I’m hoping you might clarify something for me as I want to ensure that I’m not making errors from the start. Just when I think I understand this, I get a bit jumbled up.