Featured Research

from universities, journals, and other organizations

The Evolution Of Phenotypic Polymorphism

Date:
April 17, 2005
Source:
University Of Chicago Press Journals
Summary:
This new study, which will appear in the June 2005 issue of The American Naturalist, asserts that an individual could use his/her genotype as an informative cue when "deciding" which phenotype to develop. This is a new way of looking at certain kinds of genetic polymorphism.

This new study, which will appear in the June 2005 issue of The American Naturalist, asserts that an individual could use his/her genotype as an informative cue when "deciding" which phenotype to develop. This is a new way of looking at certain kinds of genetic polymorphism.

Some species have alternative phenotypes, which are different categories of adult individuals specialized for particular circumstances. For instance, if predation risk is high in some local environments and low in others, one category might have a predation resistant phenotype, with protective devices like spines, whereas the other category lacks these devices and is instead more efficient at producing offspring.

If a developing individual can, statistically, predict the predation risk, it would be advantageous to develop the phenotype that fits the prediction. With spatial variation in predation risk, genetic determination of phenotypic alternatives can function as this kind of advantageous prediction, since natural selection will make genes for the protected type more common in local environments with high predation risk and less common in those with low risk.

Conceptually, this is the same as using some purely environmental cue signaling the presence of predators to infer the risk of predation. The evolutionary theory developed in this study suggests when genetic variation can function as an informative cue in this manner.

###

Sponsored by the American Society of Naturalists, The American Naturalist is a leading journal in the fields of ecology and evolutionary biology and animal behavior. For more information, please see our website: http://www.journals.uchicago.edu/AN.

Olof Leimar (Stockholm University), "The evolution of phenotypic polymorphism: randomized strategies versus evolutionary branching" 165:6 June 2005.


Story Source:

The above story is based on materials provided by University Of Chicago Press Journals. Note: Materials may be edited for content and length.


Cite This Page:

University Of Chicago Press Journals. "The Evolution Of Phenotypic Polymorphism." ScienceDaily. ScienceDaily, 17 April 2005. <www.sciencedaily.com/releases/2005/04/050416183740.htm>.
University Of Chicago Press Journals. (2005, April 17). The Evolution Of Phenotypic Polymorphism. ScienceDaily. Retrieved July 25, 2014 from www.sciencedaily.com/releases/2005/04/050416183740.htm
University Of Chicago Press Journals. "The Evolution Of Phenotypic Polymorphism." ScienceDaily. www.sciencedaily.com/releases/2005/04/050416183740.htm (accessed July 25, 2014).

Share This




More Plants & Animals News

Friday, July 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How to Make Single Serving Smoothies: Howdini Hacks

How to Make Single Serving Smoothies: Howdini Hacks

Howdini (July 24, 2014) Smoothies are a great way to get in lots of healthy ingredients, plus they taste great! Howdini has a trick for making the perfect single-size smoothie that will save you time on cleanup too! All you need is a blender and a mason jar. Video provided by Howdini
Powered by NewsLook.com
Boy Attacked by Shark in Florida

Boy Attacked by Shark in Florida

Reuters - US Online Video (July 24, 2014) An 8-year-old boy is bitten in the leg by a shark while vacationing at a Florida beach. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Goma Cheese Brings Whiff of New Hope to DRC

Goma Cheese Brings Whiff of New Hope to DRC

Reuters - Business Video Online (July 24, 2014) The eastern region of the Democratic Republic of Congo, mainly known for conflict and instability, is an unlikely place for the production of fine cheese. But a farm in the village of Masisi, in North Kivu is slowly transforming perceptions of the area. Known simply as Goma cheese, the Congolese version of Dutch gouda has gained popularity through out the region. Ciara Sutton reports. Video provided by Reuters
Powered by NewsLook.com
Tyrannosaur Pack-Hunting Theory Aided By New Footprints

Tyrannosaur Pack-Hunting Theory Aided By New Footprints

Newsy (July 24, 2014) A new study claims a set of prehistoric T-Rex footprints supports the theory that the giant predators hunted in packs instead of alone. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

    Health News

      Environment News

        Technology News



          Save/Print:
          Share:

          Free Subscriptions


          Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

          Get Social & Mobile


          Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

          Have Feedback?


          Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
          Mobile: iPhone Android Web
          Follow: Facebook Twitter Google+
          Subscribe: RSS Feeds Email Newsletters
          Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins