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A K a / K s ratio less than 1 implies that negative, or purifying, selection has acted on the sequence, a ratio equal to 1 suggests drift, and a ratio greater than 1 indicates that positive selection has acted on an amino acid sequence.
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The navy office nearby was open, so, as she put it, she became a sailor by accident.If Miss McGrath's early years suggest drift, putting on a uniform seemed to transform her.
The extraordinary deprivation gap in survival for men diagnosed with laryngeal cancer during 1996 99 was significantly wider than for those diagnosed in the early 1990s or in previous decades (Coleman et al, 1999), yet there is no evidence of differential trends in incidence between socioeconomic groups that might have suggested drift in the type of malignancy being recorded (data not shown).
The brain scans found drifting IQ mirrored by changes in density of nerves and other cells in parts of brains, suggesting drifts are real changes in ability, not varying concentration, mood or motivation.
For inspiration of where to head this year, Jon suggests The Drift in Totnes, Pie and Vinyl in Southsea or Soul Brother Records in Putney.
The low haplotype diversity found here suggests genetic drift in small refugial populations from the Northeast.
A corresponding low level of neutral microsatellite variability suggests that drift has played a strong role in shaping MHC variation in Galápagos hawks.
Low virus resistance in sections Polydicliae and Suaveolentes suggests genetic drift and/or selection conferred a loss of virus resistance inherited by neoallopolyploids.
However, the other types all belonged to the same family of spa types, which suggests recent drift in the sequence motifs.
This result suggests genetic drift can affect the probability of population replacement in small populations and may facilitate or hinder the spread of Wolbachia from low initial frequencies [ 54].
This pattern suggests that drift increases the strength of selection on the modifier if it increases the amplitude of the LD oscillations, but rather decreases this selection if it does not affect the LD oscillations.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com