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Biology-Related Homework Help Genetics and Developmental Biology Topic started by: Tony2001 on Feb 27, 2013



Title: What kind of selection increases the numbers of individuals with extreme phenotypes?
Post by: Tony2001 on Feb 27, 2013
What kind of selection increases the numbers of individuals with extreme phenotypes?

- Disruptive selection
- Stabilizing selection
- Directional selection

* I am thinking the correct answer would be directional selection, but I am not very sure. Any help would be greatly appreciated!



Title: What kind of selection increases the numbers of individuals with extreme phenotypes?
Post by: Riyan on Feb 27, 2013
Disruptive selection fabours both extremes (i.e. really tall individuals, and really short individuals)

Stabilizing selection favours the intermediate (i.e. moderately tall individuals)

Directional selection favours only one extreme (i.e. either really tall individuals or really short individuals)

So disruptive selection would increase the number of individuals with both extreme phenotypes, and directional selection would favour a certain extreme phenotypes.