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Wahlund effect: Internally
subdivided species have more homozygosity than an equivalent fused
population would, creating more phenotypically expressed variation.
weight: The force that
gravity exerts on a body of mass.
Wheeler box-grid: An
excavation technique developed by Mortimer Wheeler from the work
of Pitt-Rivers, involving the retaining of intact baulks of earth
between excavation grid squares, so that different layers can be
correlated across the site in the vertical profiles.
wild type: A strain,
organism, or gene of the type that is designated as the standard
for the organism with respect to genotype and phenotype.
wild-type allele: The
allele designated as the standard ("normal") for a strain
of organism.
wobble hypothesis:
A theory proposed by Francis Crick that proposes that the base at
the 5' end of the anticodon (3' end of the codon) is not as constrained
as the other two bases. This feature allows for less exact base
pairing so that the 5' end of the anticodon can potentially pair
with one of three different bases at the 3' end of the codon.
woodland: A vegetation
type characterized by discontinuous stands of relatively short trees
separated by grassland.
world system: A term
coined by the historian Wallerstein to designate an economic unit,
articulated by trade networks extending far beyond the boudaries
of individual political units (nation states), and linking them
together in a larger functioning unit.
Wormian bones: Small
bones formed within sutures from isolated centers of ossification
between major components of the skull vault. Commonly found between
the occipital and parietal bones.
woven bone: Bone of
a coarse, fibrous texture that results from rapid, relatively disorganized
growth; normally replaced later in development by more geometrically
organized bone.
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