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Life
Sciences
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Dance of Development
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This
video shows how organisms that reproduce sexually begin life as
a single cell—fertilized egg—and follow similar paths
of growth and development. In this exhibit a fertilized zebrafish
egg goes through a series of cell divisions to create many cells.
Fourteen hours after fertilization the cells begin to differentiate,
becoming various types of cells (such as nerve cells, heart cells,
sex cells). In a process called cell migration, differentiated cells
travel to specific spots in the organisms, where they develop into
different organs (such as eyes, mouth, heart, or limbs).
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