| Positive directional selection was detected for most of the internal branches harboring an accelerated rate of evolution. |
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| More limited data also indicate consistent directional selection favoring decreasing time to adulthood and reproductive maturity. |
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| A positive coefficient indicates that directional selection is acting to increase that trait. |
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| The fixation of weakly selected mutations can be greatly influenced by strong directional selection at linked loci. |
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| At their face value, these estimates indicate little evidence for directional selection. |
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| This occurs because organisms become resistant to the pesticide through directional selection. |
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| Over geologic time, directional selection leads to major changes in morphology and ways of life. |
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| According to the Neo-Darwinist, natural selection can be classified into three categories: directional selection, disruptive selection, and stabilizing selection. |
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| The process of directional selection takes place in spurts. |
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| Directional selection leads to evolution, but natural selection itself doesn't necessarily lead to evolution. |
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| Directional selection happens when the environment changes, causing the current design to be inadequate. |
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| Directional selection occurs when an allele has a greater fitness than others, so that it increases in frequency, gaining an increasing share in the population. |
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