DNA and histone proteins are packaged into structures called chromosomes. These chromosomes are only seen when the chromosome is folded for cell division.
Cells undergoing division have their DNA compacted into chromosomes with a short arm (p), a long arm (q), and a mid-section (centromere). The duplicated chromosomes are also joined together as pairs at the centromere.
- p used to identify the chromosome short arm (possibly French, petit).
- q used to identify the chromosome long arm (possibly French, tall), the next letter in alphabet after p
These letters prefixed by the chromosome number and followed by the chromosome band number, indicate gene location.
|Cell Division Links: meiosis | mitosis | Lecture - Cell Division and Fertilization | spermatozoa | oocyte | fertilization | zygote | Genetics|
Genetics Home Reference. http://ghr.nlm.nih.gov/handbook/illustrations/chromosomestructure
Government information at NLM Web sites is in the public domain. Public domain information may be freely distributed and copied, but it is requested that in any subsequent use the National Library of Medicine (NLM) be given appropriate acknowledgement. http://www.nlm.nih.gov/copyright.html
Cite this page: Hill, M.A. (2019, October 18) Embryology Chromosome- structure.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Chromosome-_structure.jpg
- © Dr Mark Hill 2019, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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