Concept of fitness, Biology

While discussing the Darwinian premise of natural selection we observed that the term selection is synonymous with non-random reproduction, and that the success of the survivors is related to the number of offsprings they leave behind. Is it possible to quantify such success? In other words can natural selection be quantified? The answer to these questions is yes and is related to the notion of 'fitness'. The term fitness variously known as Darwidan fitness or selective value or adaptive value is a measure of the reproductive efficiency of one genotype relative to another genotype within a given population of species Let us now look into the details of the concept of fitness.

Let us .take an example to explain this concept.

Let alleles A and a form three genotype AA, Aa and aa. Let genotypes AA and Aa produce four progeny each and genotype aa produce only two progeny. The fitness or the adaptive value of genotypes AA and Aa would then be 414 = 1 and that of aa would be 214 = 0.5. The two genotypes AA and Aa have similar fitness values and aa has 50% uf the fitness value of the other two. The genotype with highest reproductive efficiency is given the fitness value of 1 and the fitness of the other genotypes are calculated relative to the one with maxinlum fitness value. Fitness is denoted by the letter w. 'Table explains to you the method of calculating the fitness value for the various genotypes.

Posted Date: 4/6/2013 1:21:35 AM | Location : United States







Related Discussions:- Concept of fitness, Assignment Help, Ask Question on Concept of fitness, Get Answer, Expert's Help, Concept of fitness Discussions

Write discussion on Concept of fitness
Your posts are moderated
Related Questions
what is the chemical reaction of respiration in cockroach?

Q. Management of hypertension? the management of hypertension, angina pectoris and myocardial infarction. It must be clear to you that some aspects of dietary management may di

Define Feeding and Nutritional Management for patient of alzheimer's disease? Keeping the clinical manifestations of Alzheimer's disease in mind, treatment involves personaliz

Why can it be said that a recessive allele can remain hidden in the phenotype of an individual and revealed only when manifested in homozygosity in the offspring? A recessive a

Non living vs. Living matter As is clear from above   account the energy of matter resides in its chemical organization. The total potential chemical energy, entrapped as b

Explain about the Light sense You  must be  aware that when you  enter  into a cinema hall, you  are unable  to  see  and  find  out your  seat  initially for  a few minutes; b

What are enzymes? What is the importance of enzymes for living beings? Enzymes are proteins that are catalysts of chemical reactions. From Chemistry it is called that catalysts

Discuss the biological importance of Imidazole. Bring in examples of biomolecules that contain this group. Please be as thorough as possible.

Neurons - Nervous System Although neurons occur in a great variety of sizes and morphological forms, they have a basic plan of structure representing certain common characteri

Q Are bacteria the only prokaryotic beings? Prokaryotic beings are classified into two big groups: bacteria and archaebacteria (this last also known as eubacteria). Compared