FACTOID # 16: In the 2000 Presidential Election, Texas gave Ralph Nader the 3rd highest popular vote count of any US state.
 
 Home   Encyclopedia   Statistics   States A-Z   Flags   Maps   FAQ   About 
   
 
WHAT'S NEW
 

SEARCH ALL

FACTS & STATISTICS    Advanced view

Search encyclopedia, statistics and forums:

 

 

(* = Graphable)

 

 


Encyclopedia > Chromosome 20 (human)

Chromosome 20 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 20 spans more than 63 million base pairs (the building material of DNA) and represents between 2 and 2.5 percent of the total DNA in cells. Figure 1: Chromosome. ... Binomial name Homo sapiens Linnaeus, 1758 Subspecies Homo sapiens idaltu  (extinct) Homo sapiens sapiens Homo (genus). ... Headline text this website sucks your mothers dickIn molecular biology, two nucleotides on opposite complementary DNA or RNA strands that are connected via hydrogen bonds are called a base pair (often abbreviated bp). ... The general structure of a section of DNA Deoxyribonucleic acid (DNA) is a nucleic acid —usually in the form of a double helix— that contains the genetic instructions specifying the biological development of all cellular forms of life, and most viruses. ... Cells in culture, stained for keratin (red) and DNA (green). ...


Identifying genes on each chromosome is an active area of genetic research. Because researchers use different approaches to predict the number of genes on each chromosome, the estimated number of genes varies. Chromosome 20 likely contains between 600 and 800 genes. This stylistic schematic diagram shows a gene in relation to the double helix structure of DNA and to a chromosome (right). ...


Genes

The following are some of the genes located on chromosome 20:

  • EDN3: endothelin 3
  • JAG1: jagged 1 (Alagille syndrome)
  • PANK2: pantothenate kinase 2 (Hallervorden-Spatz syndrome)
  • PRNP: prion protein (p27-30) (Creutzfeld-Jakob disease, Gerstmann-Strausler-Scheinker syndrome, fatal familial insomnia)

PRNP (prion protein (Creutzfeld-Jakob disease, Gerstmann-Strausler-Scheinker syndrome, fatal familial insomnia)) is a gene that provides instructions to make a protein called the prion protein (PrP), which is active in the brain and several other tissues. ...

Diseases

The following diseases are some of those related to genes on chromosome 20:

)_++___ Alagille syndrome is a genetic disorder that affects the liver, heart, and other systems of the body. ... PKAN: Pantothenate Kinase-Associated Neurodegeneration Symptoms Pantothenate kinase-associated neurodegeneration (PKAN) is one of many forms of neurodegeneration, or brain deterioration . ... Transmissible spongiform encephalopathies (TSEs, also known as prion diseases) are a group of progressive conditions that affect the brain and nervous system of humans and animals and are transmitted by prions. ... Waardenburg syndrome is an inherited disorder associated with hearing loss and changes in skin and hair pigmentation. ...


References

  • Deloukas, P. et al (2001). "The DNA sequence and comparative analysis of human chromosome 20". Nature 414 (6866): 865-71. PMID 11780052.
  • Gilbert, F. (1997). "Disease genes and chromosomes: disease maps of the human genome". Genet Test 1 (3): 225-9. PMID 10464650.
Human chromosomes

{1} {2} {3} {4} {5} {6} {7} {8} {9} {10} {11} {12} {13} {14} {15} {16} {17} {18} {19} {20} {21} {22} {X} {Y} Figure 1: Chromosome. ... Chromosome 1 is one of the 23 pairs of chromosomes in humans. ... Chromosome 2 is one of the 23 pairs of chromosomes in humans. ... Chromosome 3 is one of the 23 pairs of chromosomes in humans. ... Chromosome 4 is one of the 23 pairs of chromosomes in humans. ... Chromosome 5 is one of the 23 pairs of chromosomes in humans. ... Chromosome 6 is one of the 23 pairs of chromosomes in humans. ... Chromosome 7 is one of the 23 pairs of chromosomes in humans. ... Chromosome 8 is one of the 23 pairs of chromosomes in humans. ... Chromosome 9 is one of the 23 pairs of chromosomes in humans. ... Chromosome 10 is one of the 23 pairs of chromosomes in humans. ... Chromosome 11 is one of the 23 pairs of chromosomes in humans. ... Chromosome 12 is one of the 23 pairs of chromosomes in humans. ... Chromosome 13 is one of the 23 pairs of chromosomes in humans. ... Chromosome 14 is one of the 23 pairs of chromosomes in humans. ... Chromosome 15 is one of the 23 pairs of chromosomes in humans. ... Chromosome 16 is one of the 23 pairs of chromosomes in humans. ... Chromosome 17 is one of the 23 pairs of chromosomes in humans. ... Chromosome 18 is one of the 23 pairs of chromosomes in humans. ... Chromosome 19 is one of the 23 pairs of chromosomes in humans. ... A common disease due to 3 of such chromosomes instead of the normal 2 is called Down syndrome. ... Chromosome 22 is one of the 23 pairs of chromosomes in humans. ... The X chromosome is one of the two sex chromosomes in mammals (the other is the Y chromosome). ... The human Y chromosome is one of two sex chromosomes, it contains the genes that cause testis development, thus determining maleness. ...

[Category:Chromosomes]


Its a good one.


 
 

COMMENTARY     


Share your thoughts, questions and commentary here
Your name
Your comments

Want to know more?
Search encyclopedia, statistics and forums:

 


Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms, 1022, m