Sentence examples for shape of a population from inspiring English sources

The age and sex structure of the population determines the ultimate shape of a population pyramid, such that the representation may take the form of a pyramid, have a columnar shape (with vertical sides rather than sloped sides), or have an irregular profile.

In its role as a nemesis, heterogeneity can reduce the precision of estimates, change the shape of a population model, or reduce the generalizability of study results.

Second, there is discordance between the genetic constitution and the prevailing leaf shape of a population; genetic clustering does not predict leaf shape genotype frequencies for populations.

The distribution of nucleotide differences between pairs of haplotypes shows the typical unimodal shape of a population having passed through a recent demographic expansion [ 17] and fits a sudden expansion model (the model could not be rejected, P = 0.879).

Statistical shape analysis is a tool that allows to quantify the shape variability of a population of shapes.

Roach from the lake with highest predation pressure were most divergent from the average body shape of all populations, characterized by a more streamlined body and caudally inserted dorsal fins; features that facilitate predator escape.

The model predicts that the evolutionary process shapes the DGENs of a population in the form of an hourglass, under fairly general assumptions.

Based on 37 measurements--ranging from the length of the cranium to the height of the eye sockets--the team reports this week in Nature that the worldwide pattern of skull shapes closely matches the genetic data: The diversity of cranial shape within a population falls off the farther it is from Africa.

In addition to these benefits, each target of positive selection can be used to characterize the historical forces and events that have shaped the history of a population (Biswas and Akey 2006).

Understanding how social determinants of health interact to ultimately shape a population's pattern of disease is a daunting task, full of methodological complexity and theoretical uncertainty.

This gene is expressed only in cells in primordia that are destined to become molars, so it is probably a gene that controls the shape of a tooth.With populations in rich countries getting long in the tooth, as it were, it seems likely that there will be a huge demand for regenerative dentistry.