Search Weight Loss Topics:

Home » Fitness » What about fitness? – Evolution

What about fitness?

Biologists use the word fitness todescribe how good a particular genotype isat leaving offspring in the next generation relative to how goodother genotypes are at it. So if brown beetles consistently leavemore offspring than green beetles because of their color, you'd saythat the brown beetles had a higher fitness.

Of course, fitness is a relative thing. A genotype's fitness depends on theenvironment in which the organism lives. The fittest genotype during an iceage, for example, is probably not the fittest genotype once the ice age isover.

Fitness is a handy concept because it lumps everything that mattersto natural selection (survival, mate-finding, reproduction) into one idea.The fittest individual is not necessarily the strongest, fastest,or biggest. A genotype's fitness includes its ability to survive,find a mate, produce offspring and ultimately leaveits genes in the next generation.

It might be tempting to think of natural selection acting exclusivelyon survival ability but, as the concept of fitness shows, that'sonly half the story. When natural selection acts on mate-findingand reproductive behavior, biologists call it sexual selection.

See original here:
What about fitness? - Evolution

Your Full Name
Your Email
Your Phone Number
Select your age (30+ only)	30313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120
Select Your US State	Select Your StateAlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWashington,DCWest VirginiaWisconsinWyoming
Program Choice	Select Your ProgramInjectable HGHInjectable TestoteroneInjectable SermorelinInjectable Weight LossInjectable HCG DietInjectable Vitamins
Confirm over 30 years old	Yes
Confirm that you resident in USA	Yes
This is a Serious Inquiry	Yes
Message:

Home » Fitness » What about fitness? – Evolution