In this highly condensed form chromosomes are easiest to distinguish and study.
Chromosomes vary widely between different organisms. Some species such as certain bacteria, which lack histones, also contain plasmids or other extrachromosomal DNA.
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(2) Centromere – the point where the two chromatids touch. Chromosomes are normally visible under a light microscope only when the cell is undergoing the metaphase of cell division.
Before this happens, every chromosome is copied once (S phase), and the copy is joined to the original by a centromere, resulting in an X-shaped structure.
We have advanced from the basic text chatting that became popular during the rise of the internet, to webcam chats and audio chat rooms, that allow you to see and hear others on the site.Diagram of a replicated and condensed metaphase eukaryotic chromosome.(1) Chromatid – one of the two identical parts of the chromosome after S phase. A chromosome (from ancient Greek: χρωμόσωμα, chromosoma, chroma means color, soma means body) is a DNA molecule with part or all of the genetic material (genome) of an organism. – One wonders voprostsa, flipping through page after page usage chat rooms that promise a pleasurable and enjoyable romantic appeal of the company in a comfortable, good-natured modders amusing emoticons and other beauty – although, unfortunately, in the absence of a single guest. Free Chat Now's chat room selection is separated by sexuality and interest. All of our chat rooms are intended for adults and the Sex Chat room contains explicit content. Free Chat is the top free chat website online today.Want to meet new people or find out what your buddies are up to?