Fitness shows to what extent a genotype is favored by natural selection. Fitness values are between 0 and 1. The fittest individual has a fitness of 1, and the fitness of the other members of the population can be expressed as 1 - s, where s is the selection coefficient.
Can fitness be greater than 1?
If individuals with a particular genotype, for example, 4747, consistently contribute more offspring than individuals with other genotypes (e.g., A1A2, A2A2), then their relative fitness will be greater than one.
What is a selection coefficient of 1?
A selection coefficient may have a value from zero to one; a genotype that is lethal has a selection coefficient of 1. If a particular genotype produces only 65 percent viable young, its selection coefficient is: s = 1 - 0.65 = 0.35.
Why is mean population fitness less than 1?
A population fitness less than 1 does not mean a dead population, just a population that is not reaching its maximum possible fitness. An alternative way to write these is in terms of a selection coefficient-the proportion of fitness lost due to a particular genotype.
What is the relative fitness score?
Relative Fitness (w) is the survival and/or reproductive rate of a genotype (or phenotype) relative to the maximum survival and/or reproductive rate of other genotypes in the population.
How do you calculate relative fitness?
Calculate the Relative Fitness (w) of each genotype by dividing each genotype's survival and/or reproductive rate by the highest survival and/or reproductive rate among the 3 genotypes.