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Somatic cells

  1. Dec 20, 2014 #1
    Are all somatic cells same?As they all are product of mitosis of zygote ,all somatic cells should be identical.If yes then what makes eye cell different from say heart cell i think it is switching on and off mechanism i.e these two cells are exactly the same.They will contain same 46 chromosomes but gene for eye will be on in eye cell but off in heart cell,right?
     
  2. jcsd
  3. Dec 20, 2014 #2

    Drakkith

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    Staff: Mentor

    I believe the difference between the different cells types is which genes are being expressed. Immune cells don't express the same genes as neurons do. See this article: http://en.wikipedia.org/wiki/Cellular_differentiation

    (underlining mine)
     
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