bottleneck effect

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  • This creates a bottleneck effect where an entire colony is reproduced by one queen until other queens are produced.
  • Another genetic mechanism explaining why polygyny arises is due to the bottleneck effect.
  • Though this particular species of microhylid's experienced a severe population bottleneck effect in the past, its succeeding expansion has allowed its current population trend to remain stable.
  • For example the bottleneck effect; when natural disasters dramatically reduce the size of a population resulting in a small population that may or may not fairly represent the original population.
  • Gates were often placed at tight corners, forcing a bottleneck effect upon the invading force, or even simply at right angles within a square courtyard.
  • This normally leads to a bottleneck effect during the establishment of new populations, which explains the significant genetic differentiation often found among geographically distant populations.
  • What may make the bottleneck effect a sampling error is that certain alleles, due to natural disaster, are more common while others may disappear completely, making it a potential sampling error.
  • The bottleneck effect is a double-edged sword for species that live a long time because the loss of genetic diversity would not be as obvious or as severe, but once it occurred, it would be harder to recover.
  • Platyctenida are considered to be a phylogenetically young group along with the orders Lobata and Beroida and are believed to have stemmed from an ancestral version of the order Cydippida, after some kind of bottleneck effect in the phylum.