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Fitness

Definition

noun

(1) (biology) A biological condition in which a competing variant is increasing in frequency relative to other competing variants in a population.

(2) A relative measure of reproductive success of an organism in passing its genes to the next generation.

(3) The relative ability of an individual (or population) to survive, reproduce and propagate genes in an environment.

(4) The state or quality of being fit, e.g. physically or mentally; being in shape, good health or well-being.

(5) The capability to perform a function.

(6) The ability of an organism to survive and reproduce in its enviornment.


Supplement

In biology, Darwinian fitness or simply fitness of a biological trait describes how successful an organism has been at passing on its genes. The more likely that an individual is able to survive and live longer to reproduce, the higher is the fitness of that individual.

There are two ways through which fitness can be measured:


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Results from our forum


Cellular Reincarnation

... including me, were lured by the “Carte Blanche” awaiting the winner. Before the start, we were boasting like little Titans, judging each other’s fitness and calculating our odds. Suddenly, we were launched and hyperactively we raced towards our goal. I realized that my chances to win were next ...

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by ewartkuijk
Sun Feb 09, 2014 8:25 pm
 
Forum: General Discussion
Topic: Cellular Reincarnation
Replies: 0
Views: 380

How Does Natural Selection Create Ordered Variation?

... organisms have a lot of off springs the population will be uniform after a while. But most of the time it's different things that can increase the fitness, not only one. And if factors change most of the time they don't change for all individuals of a species - only for a population. So you get ...

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by Tricho
Wed Jan 22, 2014 1:16 am
 
Forum: Evolution
Topic: How Does Natural Selection Create Ordered Variation?
Replies: 7
Views: 1391

Re:

... serious proposals to explain the evolution of menopause is the grandmother hypothesis . The central idea is that for older women, the individual fitness benefit from having new children is actually less that the fitness benefit obtained by devoting effort to the raising of the grandchildren. ...

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by badgertoes
Sat Dec 28, 2013 9:01 am
 
Forum: Evolution
Topic: Gender divison in two opposites is greatest mistake of manki
Replies: 22
Views: 5770

Re: Beneficial mutations vs harmful

Natural selection; survival to reproduce. Collections of genes (or more accurately a given gene variant) with better fitness, tend to survive to reproduce more often than those without. Basically harmful mutations tend to lower fitness, whereas beneficial mutations tend to increase ...

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by NMLevesque
Fri Nov 22, 2013 6:51 pm
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 3810

Re: Re:

... which is detrimental. They do accumulate; but the more they accumulate the more opportunity there is for compensatory mutations to bring the basic fitness level back to a kind of running equilibrium in fitness. After reading your post, I spotted an erroroneous intuition I've had about this issue. ...

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by wildfunguy
Sat Oct 19, 2013 9:18 pm
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 3810
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