Sentences with word «assortative»

As the variance of admixture has been used to infer the timing of hybridization and sex - biased admixture, we consider the implications of assortative mating for inferring population history and speciation.

This article examines alternative explanations for such observed concordance and discusses the effects of assortative mating on population genetics and the social environment.

The researchers also tested for assortative mating in other traits, such as years of education, in 7780 couples in a U.K. database.

There are methods which achieve lower ΔF than predicted via random mating which may be useful in the preservation of genetic diversity, for example negative assortative mating and optimum selection techniques where weighting is only placed on minimising ΔF [12, 13].

Using genetic analyses the researchers confirmed that the creatures tend to choose mates of a similar size (a selection process known as assortative mating).

Dr Hugh - Jones, a senior lecturer in economics, said: «Our findings show strong evidence for the presence of genetic assortative mating for education in the UK.

So - called assortative mating, in which animals that look similar are more likely to mate with each other, is one of the causes of new species development.

Mating pairs often exhibit levels of similarity in phenotypic or genotypic traits that differ systematically from the level expected under random mating, produced by assortative mating.

For example, in admixed human populations, spouses possess correlated ancestry components suggestive of positive assortative mating on the basis of ancestry.

Because dog breeding is mainly assortative breeding, without the sorting of individuals by trait, a breed could not be established, nor could poor genetic material be removed.

were found between the partners, indicating a trend toward assortative mating.

Notes Jones, «in seahorses assortative mating appears to be a consequence of male pregnancy and monogamy.»

They examined whether assortative mating for educational achievement could be detected in the DNA of approximately 1600 married or cohabiting couples in the UK.

Such assortative mating increases relatedness in families and can help their offspring survive better as long as the trait under selection (larger size, for example) continues to be beneficial — helping males acquire and fend off mates, for example.

Our model provides a framework to quantitatively study assortative mating under flexible scenarios of mating and hybridization over time.

[Commentary on «Parasite - stress promotes in - group assortative sociality,» by Fincher, C. & Thornhill, R.] Behavioral & Brain Sciences, 35 (1), 89 - 90.

We — nd that both women and men value physical attributes, such as age and weight, and that choices are assortative along age, height, and education.

And unlike assortative mating, blood - sport parenting, and legacy admissions to the Ivy League, it is within our power as educators and policymakers to influence children's acquisition of that language.

They give the example of a Cavalier King Charles part of a breed where the direction is to reinforce the small size of the dog but as a result of such an intensive assortative breeding, the skull's size of some dogs became too small for their brain, resulting in severe neurological conditions.

Leveling the playing field: Acquaintance length predicts reduced assortative mating on attractiveness.

shown to favor complementarity over assortative mating.

A body of theory in reproductive decision making referred to as assortative mating has recently been building up an impressive body of support.

However, they found that the scores of the original couples showed greater similarities than the randomly generated pairs, indicating significant genetic assortative mating for educational attainment regardless of educational level and geographic location.

Perhaps this is a reason why: one little - discussed feature of modern life is so - called assortative mating - university graduates now tend to pair off with other graduates (and non-graduates with non-graduates).

The trend toward assortative mating is the rule in Western societies for a large series of factors.

The consequences of assortative mating on education and cognitive abilities are relevant for society, and for the genetic make - up and therefore the evolutionary development of subsequent generations.

Evidence for assortative mating among humans is well established; humans mate assortatively regarding age, IQ, height, weight, nationality, educational and occupational level, physical and personality characters and family relatedness.

The concept of narcissism is used in evolutionary psychology in relation to the mechanisms of assortative mating, or the non-random choice of a partner for purposes of procreation.

They determined that if environmental conditions favor either very small or very large body sizes as opposed to intermediate ones, new species may arise in just tens or hundreds of generations as a result of assortative mating.

Some recent studies indicate that facial resemblance between couples was a strong driving force among the mechanisms of assortative mating: human couples resemble each other significantly more than would be expected from random pair formation.

«When growing social inequality is, partly, driven by a growing biological inequality, inequalities in society may be harder to overcome and the effects of assortative mating may accumulate with each generation.»

«Assortative mating on inheritable traits that are indicative of socio - economic status, such as educational achievement, increases the genetic variance of characteristics in the population.

Assortative mating boosts the odds that a trait, such as height, will be passed to offspring.

This is evidence in humans of assortative mating, which is a form of sexual selection in which individuals with similar traits mate with one another more frequently than would be expected under a random mating.

Under the model, we study the distribution of genetic ancestry on the autosomes and X chromosome for positive and negative assortative assortative mating, allowing migration to the hybrid population to vary between sexes and over time.

The effect of assortative mating is smaller on the X chromosomes than the autosomes because inheritance of the X in males depends only on the mother's ancestry, not on the mating pair.

We demonstrate that, whereas the mean admixture under assortative mating is equivalent to that of a randomly mating population, the variance of admixture generally increases with higher levels of positive assortative mating and decreases with negative assortative mating, analogous to classic theory on assortative mating by single locus genotypes or traits.

My work also links admixture dynamics with classic population genetic models of breeding and assortative mating by genotype.

Additionally, assortative mating has been proposed as a mechanism for hybrid and sympatric speciation.

Correlation of CAG repeat length between the maternal and paternal allele of the Huntingtin gene: evidence for assortative mating.