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Biology / Unit 8   Bio 1781 short lesson, about 20 seconds

The Handicap Principle and the Good Genes Hypothesis

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The idea

The handicap principle and good genes hypothesis both propose a costly ornament signals male quality, but the field has not settled which is correct.

In practice

The handicap principle holds the cost itself proves fitness; good genes holds the ornament directly signals disease resistance.

Where people slip

Both hypotheses are stated in strongest form, no verdict declared — costly signaling remains an open question.

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