Dictionary » D » Disruptive Selection

Disruptive Selection

Sometimes called Diversifying selection. This type of selection favors both the extremes at the expense of the average.

An example of this is rabbits. In this example the rabbits have either black and white fur co-dominant genes, black fur represented by “B��? and white fur represented by “b��?. A rabbit with the genotype of “BB��? would have a phenotype of black fur, a genotype of “Bb��? would have gray fur (a display of both black and white) and a genotype of “bb��? would have a phenotype of white fur.

If this population of rabbits were put into an area that had very dark black rocks as well as very white colored stone, the rabbits with black fur would be able to hide from predators amongst the black rocks and the white furred rabbits would be able to hide in the white rocks, but the gray furred rabbits would stand out in both of the habitats and thus would not survive.

If the very large and very small individuals in a population are favored and the average-sized individuals are selected against, this type of selection occurs.


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Is complexity inevitable?

Err ignore the link. it's not quite disruptive selection, is it?

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by wildfunguy
Sat Oct 19, 2013 3:29 pm
 
Forum: Evolution
Topic: Is complexity inevitable?
Replies: 16
Views: 4647

Re:

... branches to collect the fruit. That is, the population is undergoing disruptive selection . However, some Homo are starting to make tools. In the grassland, these Homo make ...

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by wildfunguy
Sat Oct 19, 2013 3:13 pm
 
Forum: Evolution
Topic: Is complexity inevitable?
Replies: 16
Views: 4647

Hardy-Weinberg problems

... are not changing. But look at this: What about an example where disruptive selection favours homozygotes instead of heterozygotes, so the phenotypic frequencies change ...

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by SheffJoe
Tue May 15, 2012 7:49 pm
 
Forum: Genetics
Topic: Hardy-Weinberg problems
Replies: 1
Views: 918

Reproductive Isolation

... result in reproductive isolation as a secondary consequence of natural selection? Heres my attempt: Natural selection can favor two extreme phenotypes, and select against against the majority. This can result in a disruptive selection, and ultimately to speciation. What else am I missing?

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by ReMuSoMeGa
Thu Feb 02, 2012 6:51 am
 
Forum: Evolution
Topic: Reproductive Isolation
Replies: 0
Views: 1362

Evolution questions

... among populations results in a movement of alleles called: a. disruptive selection. b. directional selection. c. gene flow. d. hybridization. e. recombination. My answer ...

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by Ryosuke
Fri Nov 18, 2011 7:21 am
 
Forum: Evolution
Topic: Evolution questions
Replies: 1
Views: 5048
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