No matter how it is born, a new gene starts its life as a single copy in the population.

As with any new mutation, by far the most likely outcome is that it will be lost by random drift or selection over the next few generations

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#Id: 2214

#Unit 11. Evolution and Behavior

Populational change is Darwin’s hypothesis that evolution occurs by changes in the proportions (frequencies) of different variant kinds of individuals within a population.

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#Id: 4505

#Unit 13. Methods in Biology

Electroencephalography (EEG)

A method to record an electrogram of the spontaneous electrical activity of the brain.

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#Id: 8954

#Unit 11. Evolution and Behavior

As a chromosome with a new gene duplicate spreads through a population, there is polymorphism in the number of copies of the gene that individuals carry. This situation, called copy number variation.

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#Id: 3597

#Unit 3. Fundamental Processes

“Dictionary” of amino acid code words in mRNAs.

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#Id: 10050

#Unit 4. Cell Communication and Cell Signaling

Binding of Notch to Delta 

is followed by endocytosis of Delta by the signaling cell