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Home Q & A Board Biology-Related Homework Help Cell Biology
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finleybrianna finleybrianna
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11 years ago
Do the cells that give rise to erythrocytes, striated muscles, and neurons have the same genes? Do they have the same proteins?
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mickey3099mickey3099
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11 years ago
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11 years ago
All of your cells have the same DNA (well, some have no DNA, but most do.).

What makes a muscle cell different from a blood cell or brain cell is mostly in how those genes are used.  Not all the information in the DNA is used at the same time.  In one tissue, a certain set of genes is turned on (expressed), and the rest are turned off or expressed at lower levels.  In another tissue, a different set of genes is expressed.  What genes are expressed dictates what proteins will be present (remember DNA-->mRNA-->protein).  So, across different cell types you'll see different proteins and protein levels (though many proteins are present in ALL human cells, too).
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