When the peroxidase system is blocked or when it is hereditarily absent from the cells, the rate of formation of thyroid hormones falls to zero

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#Unit 11. Evolution and Behavior

Fitness- Average number of offspring produced by a genotype and divide it by the mean number of offspring produced by the most prolific genotype

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#Id: 9180

#Unit 11. Evolution and Behavior

Average fitness

In a species, only 1 of every 1000 seeds survives to reproductive age, and that those that survive produce an average of 3000 seeds. 

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#Id: 9181

#Unit 11. Evolution and Behavior

TLS Online TPP Program

#Id: 9182

#Unit 11. Evolution and Behavior

Selection coefficient

A related variable is the selection coefficient (s), which is the relative intensity of selection against a  genotype

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#Id: 9183

#Unit 11. Evolution and Behavior

The selection gradient measures the strength of directional selection acting on a quantitative trait.

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#Id: 9184

#Unit 11. Evolution and Behavior