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Home Q & A Board Biology-Related Homework Help Environmental and Conservation Biology
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zyxomma77 zyxomma77
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11 years ago
I recount a question I encountered a few months ago, but never got around to asking. Shouldn't be anything too difficult (question was in the genetic drift section of a textbook), but I could use a few opinions. It goes along the lines of:

1. In a population of 1000 organisms, 2 unfortunate individuals, both possessing an array of beneficial mutations, are eliminated due to a random, sudden event. Is this an example of a population bottleneck? Why/why not? If not, what "type" of genetic drift was this?

I look forward to reading your responses. Thanks beforehand...
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smithj8787smithj8787
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11 years ago
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11 years ago
I would not qualify it as a bottleneck.  There was barely any decrease in population.  Allele frequencies changed by a maximum of 0.2% even if those were the only individuals with those specific alleles  and at most 4 alleles could be lost for any locus.  The term genetic erosion would might be applicable, but this scenario is so improbable that I'm not sure it it has been characterized.
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