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In humans, the influence of smell was demonstrated in an experiment by Wedekind et al, which showed a.
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Jun 16, 2009 · Sexual selection was addressed in Descent of Man, and Selection Related to Sex in 1871.
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Females and males often show striking differences in morphological, behavioural and physiological traits.
Natural selection occurs when some individuals out-reproduce others, and those that have more offspring differ genetically from those that have fewer.
Figure 45.
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Figure 45.
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The differences may be extreme, as in the adaptations for sexual selection seen in the exotic plumes.
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In intersexual selection, one sex, usually the male, develop certain desirable trait to attract the female.
5 shows some examples of secondary sex characteristics produced by sexual selection.
There are, however, species in which the sexes exhibit striking dimorphism.
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