The “introns early” hypothesis is the proposal that introns have always been an integral part of the gene.  Genes originated as interrupted structures, and those now without introns have lost them in the course of evolution.

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#Unit 11. Evolution and Behavior

Breeder’s equation, predict how much evolutionary change will result from selective breeding.

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#Unit 11. Evolution and Behavior

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#Unit 11. Evolution and Behavior

Phenotypic plasticity can be visualized with the reaction norm.

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#Unit 11. Evolution and Behavior

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#Unit 11. Evolution and Behavior

TLS Online TPP Program

#Id: 8952

#Unit 11. Evolution and Behavior

One is unequal crossing over, in which recombination happens between different positions on chromosomes that are misaligned during meiosis. 

Another is replication slippage, in which the DNA polymerase loses its place and copies a segment of chromosome twice.