How To Use Sinistrality In A Sentence
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There is no trend from dextrality to sinistrality, but rather large clades characterized by one form or the other, sometimes with large-ish subclades of the complementary type.
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Handedness is known to affect patterns of mating in gastropods, making it likely that the establishment of sinistrality in dextral lineages is associated with sexual selection.
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Such selection is inimical to the evolution of traits like sinistrality that, at least in their early stages of development, are accompanied by mildly deleterious side effects.
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What I mean to suggest here is that sinistrality was encoded as a sign of self-portraiture itself.
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Further evidence that species-level sinistrality originated in environments where predator-induced selection is weak comes from the biology of living left-handed species.