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Example of Runaway Selection. Theory of random sexual selection of mates. Used to explain passing on of useless or 'expensive' genes which may create liabilities. It's called 'runaway' selection because the gene traits carried on may become liabilities if carried to extremes. The genes may in fact exaggerate physical characteristics which makes the animal less able to survive, rather than more so, in normal evolutionary theory.
Overview of Feature Selection. In machine learning and statistics, feature selection is the process of selecting a subset of relevant, useful features for use in building an analytical model. Feature selection helps narrow the field of data to just the most valuable inputs, reducing noise and improving training performance.