Inbreeding coefficient (F)

Probability that an individual has two identical alleles for a given gene. Inbreeding coefficients can range from 0 to 1.

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#Id: 7044

#Unit 11. Evolution and Behavior

Orthogenesis - “Straight-line evolution,” held that the variation that arises is directed toward fixed goals.

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#Id: 7045

#Unit 11. Evolution and Behavior

 Mutationist - Theories were advanced by some geneticists who observed that discretely different new phenotypes can arise by a process of mutation.

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#Unit 11. Evolution and Behavior

Ronald A. Fisher, John B. S. Haldane and Sewall Wright- which showed that mutation and natural selection together cause adaptive evolution.

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#Unit 11. Evolution and Behavior

Neutral theory of molecular evolution- Developed by Motoo Kimura, who argued that most of the evolution of DNA sequences occurs by chance (genetic drift) rather than by natural selection. 

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#Id: 7048

#Unit 11. Evolution and Behavior

Theory of recapitulation - Ernst Haeckel

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#Unit 11. Evolution and Behavior

He proposed that the embryonic development of an individual organism (its ontogeny) followed the same path as the evolutionary history of its species (its phylogeny).