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Relative fitness between red and brown wolves

You find that out of 20 of red wolves released, 18 survive, and out of 10 brown wolves released, 4 survive. What is the relative fitness of red and brown wolves?

I have the fitness of the red wolves (favored genotype?) as 1, but I keep getting a negative number for the brown wolves' fitness.

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Relative fitness (w) is the survival and/or reproductive rate of a genotype (or phenotype) relative to the maximum survival and/or reproductive rate in the population. Based in this, to calculate relative fitness of each phenotype you have to divide each phenotypes survival or reproductive ...

Solution Summary

The solution determines the relative fitness between red and brown wolves.