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Stabilising Selection Selected Extremes Frequency Alleles Birth Define

Stabilizing selection favors the norm/average and selects against extremes, reducing the frequency of alleles at the extremes and increasing average alleles; birth weight is an example.

La sélection stabilisatrice favorise la moyenne et désavantage les extrêmes, réduisant la fréquence des allèles aux extrémités et augmentant celle des allèles moyens ; un exemple est le poids à la naissance.

Front Define the term stabilising selection & describe the consequences of it for a population. + give example
Back Stabilising selection - norm/average is selected for and extremes are selected against
  • Results in reduction of frequency of alleles at extremes & increase in frequency of average alleles
  • E.g. birth weight of babies if too low - prone to infections, if too high - difficult birth

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