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In the context of evolution, certain traits or alleles of a species may be subject to selection. Under selection, individuals with advantageous or "adaptive" traits tend to be more successful than their peers reproductively--meaning they contribute more offspring to the succeeding generation than others do. When these traits have a genetic basis, selection can increase the prevalence of those traits, because offspring will inherit those traits from their parents. When selection is intense and persistent, adaptive traits become universal to the population or species, which may then be said to have evolved.

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Wikipedia About Selection

In the context of evolution, certain traits or alleles of a species may be subject to selection. Under selection, individuals with advantageous or "adaptive" traits tend to be more successful than their peers reproductively--meaning they contribute more offspring to the succeeding generation than others do. When these traits have a genetic basis, selection can increase the prevalence of those traits, because offspring will inherit those traits from their parents. When selection is intense and persistent, adaptive traits become universal to the population or species, which may then be said to have evolved.

Overview

Whether or not selection takes place depends on the conditions in which the individuals of a species find themselves. Adults, juveniles, embryos, and even eggs and sperm may undergo selection. Factors fostering selection include limits on resources (nourishment, habitat space, mates) and the existence of threats (predators, disease, adverse weather). Biologists often refer to such factors as selective pressures.

Natural selection is the most familiar type of selection by name. The breeding of dogs, cows and horses, however, represents "artificial selection." Subcategories of natural selection are also sometimes distinguished. These include sexual selection, ecological selection, stabilizing selection, disruptive selection and directional selection (more on these below).

Selection occurs only when the individuals of a population are diverse in their characteristics--or more specifically when the traits of individuals differ with respect to how well they equip them to survive or exploit a particular pressure. In the absence of individual variation, or when variations are selectively neutral, selection does not occur.

Meanwhile, selection does not guarantee that advantageous traits or alleles will become prevalent within a population. Through genetic drift, such traits may become less common or disappear. In the face of selection even a so-called deleterious allele may become universal to the members of a species. This is a risk primarily in the case of "weak" selection (e.g. an infectious disease with only a low mortality rate) or small populations.

Though deleterious alleles may sometimes become established, selection may act "negatively" as well as "positively." Negative selection decreases the prevalence of traits that diminish individuals' capacity to succeed reproductively (i.e. their fitness), while positive selection increases the prevalence of adaptive traits.

In biological discussions, traits subject to negative selection are sometimes said to be "selected against," while those under positive selection are said to be "selected for," as in the sentence Desert conditions select for drought tolerance in plants and select against shallow root architectures.

Search results for Selection

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Selection - MDC

When making a selection with a mouse, the anchor is where in the document the ... As the user changes the selection using the mouse or the keyboard, the focus is ...developer.mozilla.org/en/docs/DOM:Selection

Natural Selection

Action-strategy Half-Life mod.www.natural-selection.org/

selection - Definition from the Merriam-Webster Online Dictionary

Definition of selection from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.www.merriam-webster.com/dictionary/selection

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Survey Confirms Location as Top Criteria for Hotel Selection - Location-based Website Lets Savvy Travelers Book the ...

PRWeb via Yahoo! News The importance of location in hotel selection comes as no surprise to founders of www.seeyourhotel.com who have built a website for savvy travelers. Their site combines Google Map technology with hotel information from Hotels.com to simplify the task of booking the right hotel in a convenient location. More than 50000 visitors a month have already shown that location matters, and the recent ...http://news.yahoo.com/s/prweb/20080917/bs_prweb/prweb1345864...

Mercedes-Benz Presents the GLK-Class Selection: Select Products for Limitless Leisure-time Enjoyment

The Auto ChannelSTUTTGART – September 16, 2008 : The market launch of the new GLK-Class brings with it the launch of the GLK-Class Selection, a range of products whose distinctive design, high-quality, robust materials and confident colour scheme in the original vehicle colours underline the versatile personality of the compact Sports Utility Vehicle.http://www.theautochannel.com/F/news/2008/09/16/111077.html

Evidence of evolutionary selection found in 544 genes

PhysOrg(PhysOrg.com) -- By comparing the genomes of humans and five other mammals, Cornell researchers have identified 544 genes that have been shaped by positive selection over millions of years of evolution.http://www.physorg.com/news140797545.html

Jury Selection for David Damm

WIFR RockfordJury selection continues in Jo Daviess County today in the trial of a 59 year old man accused in a plot to kill a 13 year old girl.http://www.wifr.com/news/headlines/28479134.html

Torre, Santo, Wills among 10 to be up for Hall selection

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Lack of judgment using Quade Cooper at flyhalf

News.com.auHaving no selector from outside a team's coaching structure is a dangerous practice. Experienced heads such as Tim Horan, David Croft, Daniel Herbert or John Connolly would be happy to sit on a Reds selection panel and provide a valuable sounding ... http://www.news.com.au/couriermail/story/0,23739,25452537-50...

3M pollution jury selection starts today

Minneapolis Star TribuneWhat was done was legal. The ability to measure to these ppb levels was not even available until recently You would have to drink … read more something like 500,000 glasses per day to get to the MPCA limits. Oh by the way, your water has never been ... http://www.startribune.com/local/east/44271152.html?elr=KArk...

Now, bell the CAT online

Times of IndiaIt has already been confirmed that the Common Admissions Test (CAT), used in selection process for admission to the Indian Institutes of Management, a network of India's most prestigious business schools based in Ahmedabad, Bangalore, Calcutta ... http://timesofindia.indiatimes.com/Lucknow/Now-bell-the-CAT-...

One last shot: Final softball bracketology

ESPN.comAlong with Mississippi State, Arkansas probably will be a flash point in this year's selection process. On one hand, it finished at .500 after a run-rule loss against Alabama in the SEC tournament quarterfinals and was just 2-8 in its last 10 and 6 ... http://sports.espn.go.com/espn/blog/index?entryID=4155991&na...

Bell and Sidebottom press England re-entry button

The IndependentTheir selection at least should finally quell the notion that either Michael Vaughan or Stephen Harmison are in the frame for a recall. Although the names of the erstwhile captain and strike-bowler have been much discussed, only conspiracy ... http://www.independent.co.uk/sport/cricket/bell-and-sidebott...

Search results for Selection

Personnel Selection Internet Guide

Human Resources Internet Guide to Personnel Selection. Extensive review of methods, uses, and issues surrounding employee selection.http://www.hr-guide.com/selection.htm

Selection - Psychology Wiki

In the context of evolution, certain traits or alleles of a species may be subject to selection. Under selection, individuals with advantageous or "adaptive" traits tend ... http://psychology.wikia.com/wiki/Selection

selection - definition of selection by the Free Online Dictionary ...

se·lec·tion (s-l k sh n) n. 1. a. The act or an instance of selecting or the fact of having been selected. b. One that is selected. 2. A carefully chosen or representative ... http://www.thefreedictionary.com/selection

Selection Sort

Description, source code, algorithm analysis, and empirical results for selection sort.http://linux.wku.edu/~lamonml/algor/sort/selection.html

selection - definition of selection in the Medical dictionary - by the ...

selection /se·lec·tion/ (sĕ-lek´shun) the play of forces that determines the relative reproductive performance of the various genotypes in a population.http://medical-dictionary.thefreedictionary.com/selection

Wikipedia results for Selection

Selection - Wikipedia, the free encyclopedia

In the context of evolution, certain traits or alleles of a species may be subject to selection depending on the Pragmatics the user has with the word.http://en.wikipedia.org/wiki/Selection

Natural selection - Wikipedia, the free encyclopedia

Natural selection is the process by which favorable heritable traits become more common in successive generations of a population of reproducing organisms, and unfavorable ... http://en.wikipedia.org/wiki/Natural_selection

Selection bias - Wikipedia, the free encyclopedia

Selection bias (e.g. Berkson's bias) [1] is a distortion of evidence or data that arises from the way that the data are collected. It is sometimes referred to as the selection ... http://en.wikipedia.org/wiki/Selection_effect

Selection cutting - Wikipedia, the free encyclopedia

Selection cutting is the silvicultural practice of harvesting a proportion of the trees in a stand. Selection cutting is the practice of removing mature timber or thinning to ... http://en.wikipedia.org/wiki/Selection_cut

United Kingdom Special Forces Selection - Wikipedia, the free ...

United Kingdom Special Forces Selection is the selection and training process for members of the United Kingdom's three Special Forces formations: Special Air Service, Special Boat ... http://en.wikipedia.org/wiki/UKSF_Selection
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Videos found for Selection

OJ Simpson jury selection under way

OJ Simpson jury selection under wayJury selection has started in OJ Simpson's armed robbery and kidnapping trial in Las Vegas. Simpson is back in court more than ten years after he was cleared of the murder of his...Flash - Video

Diana jury selection process held

Diana jury selection process heldUp to 200 potential jurors are at the Royal Courts of Justice for the Diana, Princess of Wales inquest selection process.Over ten years after her death in August 1997, the...Flash - Video

Jury selection for Simpson trial be...

Jury selection for Simpson trial beginsThe former NFL football star faces 12 charges in connection to alleged involvement in a heist in a Las Vegas hotel last year. Sarah Irwin reports.Flash - Video

Ethical Concerns Surrounding Gender...

Ethical Concerns Surrounding Gender SelectionModern science now allows parents to choose whether they want a boy or a girl. Lisa Sigell reports.Windows Media - Video

Pau Gasol Reacts To His 2nd All-Sta...

Pau Gasol Reacts To His 2nd All-Star SelectionJohn Ireland reports.Windows Media - Video

Answers for Selection

SummerWhat challenges could arise from standardizing employee selection programs in a multinational organizational?SummerMany factors that rate employee qualifications are difficult to quantify through a rating system. Attributes such as confidence, motivation, speaking ability and writing level are difficult to auto...sokratesDid natural selection fortuitously give cats tongues that are like sand paper for them to clean themselves?sokratesA feeling of rough sandpaper as you are licked by your cat is a reminder that its long, muscular tongue serves many functions, including grooming. A cat’s ability to groom itself is the result of nu...mustangmomWhat is a quick activity to demonstrate natural selection to a HS biology class?mustangmomGet a bag of candy corn, the yellow, orange and white kind. Get a bag of M & M's mulitcolored. Count how many of each color of M & M's to start. Dump them all in together and mix in a shallow conta...Toni EWhat are the main factors that are required for natural selection to occur?Toni Ethis is from wikipedia Artificial selection is the intentional breeding of certain traits, or combinations of traits, over others. It was originally defined by Charles Darwin in contrast to the proce...JackHow about natural selection and the peppered moth observations?JackIndustrial Melanism and the Peppered Moth are not by themselves sufficient evidence to say that the theory of evolution by natural selection is proved. (of course, in science *nothing* is ever prov...
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