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The mitochondrial genotype is inherited through the cytoplasm, and so follows the female line through the generations. Due to random sampling, mitochondrial genotypes get "lost", and so the number gradually decreases (irregularly) through the generations, and finally one mitochondrial genotype is "fixed". This produces a Mitochondrial Eve. This is a prospective simulation - starting with 10 mitochrondrial genotypes the simulation portrays the irregular loss of variation until one genotype is fixed. A set of Thought Questions guides the student in interpreting the simulation results. Some decription of of this learning object and its use is at http://hescgi.oit.ncsu.edu/mit-eve-disc.html

and a bit more is at http://hescgi.oit.ncsu.edu/mit-eve-desc.html (Keywords: genetics evolution simulation)

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