Stem cells are undifferentiated cells that have the ability to continue to grow and divide in their nonspecialized state for long periods
of time (eg., months or years)
although the genes found within stem cells are the same, stem cells differentiate into unique cell types (eg, muscle cells, nerve
cells, etc.) due to
а.
different patterns in their gene expression
mutations in their genetic code.
meiotic division and fertilization
d.
random segregation and proliferation
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