Dying Race: Difference between revisions

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* ''[[Star Trek the Next Generation (TV)|Star Trek the Next Generation]]'' episode "Up the Long Ladder". The inhabitants of the planet Mariposa reproduce by cloning and are suffering from a disorder called [http://memory-alpha.org/wiki/Replicative_fading replicative fading] that occurs when DNA is cloned too many times. If not corrected, they won't be able to reproduce.

* ''[[Star Trek the Next Generation (TV)|Star Trek the Next Generation]]'' episode "When the Bough Breaks". The inhabitants of the planet Aldea have become sterile as a side effect of their planetary cloaking device. The Aldeans decide to steal children from the Enterprise to carry on their civilization.

* ''[[Earth Final Conflict]]'': the Taelons are dying.

* ''[[Earth: Final Conflict]]'': the Taelons are dying.

* ''[[Farscape (TV)|Farscape]]'''s Ancients, the ones who gave John the wormhole information.

* In between the old and new series of ''[[~~Doctor Who (TV)|~~Doctor Who]]'', the Doctor used "the Moment" to wipe out all the Time Lords, leaving just him, {{spoiler|an [[Opposite Sex Clone]] genetic anomaly that may or may not "count", a handful of part-human hybrids, and, at least for a time, his arch-enemy the Master}}.

* In between the old and new series of ''[[Doctor Who]]'', the Doctor used "the Moment" to wipe out all the Time Lords, leaving just him, {{spoiler|an [[Opposite Sex Clone]] genetic anomaly that may or may not "count", a handful of part-human hybrids, and, at least for a time, his arch-enemy the Master}}.

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== Real Life ==

* Once a species declines too far, a process called [~~http://en.~~wikipedia~~.org/wiki/Mutational_meltdown~~ mutational meltdown] can set in, whereby mutations accumulate and become widespread faster than natural selection can remove them from the population. As a result, more defects accumulate until the species is doomed to extinction.<ref>The exact point at which this would occur is a bit nebulous, but it's theorized that at least 3,500 genetically different (i.e. not related) individuals are necessary for a population to thrive. Less than that, and the population is likely doomed.</ref>

* Once a species declines too far, a process called [[wikipedia:Mutational meltdown|mutational meltdown]] can set in, whereby mutations accumulate and become widespread faster than natural selection can remove them from the population. As a result, more defects accumulate until the species is doomed to extinction.<ref>The exact point at which this would occur is a bit nebulous, but it's theorized that at least 3,500 genetically different (i.e. not related) individuals are necessary for a population to thrive. Less than that, and the population is likely doomed.</ref>

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[[Category:Alien Tropes]]

[[Category:Dying Race]]

[[Category:Trope]]