人類的21號染色體是23對染色體的其中之一,正常狀況下每個細胞擁有兩條。此染色體是所有人類染色體中最小的一個,含有大約4700萬個鹼基對,佔細胞內所有DNA的1.5%。

Quick Facts 21號染色體 ...
21號染色體
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物種 Homo sapiens
基因數量 200-400
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21號染色體的定序是在2000年宣布完成,是人類基因組計畫中第二條定序完成的人類染色體。此染色體內大約含有300到400個基因,依預測方式而有所不同。

相關疾病

  • 阿茲海默症第一型
  • 肌肉萎縮性側索硬化症(漸凍人症)第一型
  • 唐氏症候群
  • Holocarboxylase synthetase deficiency
  • Homocystinuria
  • Jervell and Lange-Nielsen syndrome
  • Leukocyte adhesion deficiency
  • Nonsyndromic deafness
  • Nonsyndromic deafness, autosomal recessive
  • Romano-Ward syndrome

參考文獻

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