Stem cells are undifferentiated cells that have the ability to continue to grow and divide in their nonspecialized state for lon
g 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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All somatic cells are genetically identical. For differentiation to occur, appropriate molecular signals like growth factors stimulate stem cells to silence certain genes and express certain genes. Due to different sets of genes expressed, a cell now becomes a differentiated cell that is functional.
Hence, due to different patterns of gene expression, a cell is specialised.
