Which is an example of assortative mating?
assortative mating, in human genetics, a form of nonrandom mating in which pair bonds are established on the basis of phenotype (observable characteristics). For example, a person may choose a mate according to religious, cultural, or ethnic preferences, professional interests, or physical traits.
Who created the theory of assortative mating?
John Brockman
Introduction by John Brockman In this Edge feature, he presents his new Assortative Mating Theory which connects his two fields of research: the characteristics of autism in terms of understanding what’s going on in the brain and the causes of the condition; and understanding the differences between males and females.
How does assortative mating affect Hardy Weinberg equilibrium?
Hardy–Weinberg Equilibrium and Random Mating Non-random mating leads to departures from Hardy–Weinberg proportions. By contrast, negative assortative mating (where opposites attract and individuals prefer to mate with phenotypically different individuals) results in excess of heterozygotes.
What statement best describes assortative mating?
What statement best describes assortative mating? Individuals with similar phenotypes are more likely to mate.
What is the effect of assortative mating?
Assortative mating has reproductive consequences. Positive assortative mating increases genetic relatedness within a family, whereas negative assortative mating accomplishes the opposite effect.
What is the importance of assortative mating?
Evolutionary theory predicts that positive assortative mating—the tendency of similar individuals to mate with each other—plays a key role for speciation by generating reproductive isolation between diverging populations.
What is the role of assortative mating in creating new species?
Evolutionary theory predicts that positive assortative mating-the tendency of similar individuals to mate with each other-plays a key role for speciation by generating reproductive isolation between diverging populations.
Does assortative mating cause evolution?
Like recombination, non-random mating can act as an ancillary process for natural selection to cause evolution to occur. Any departure from random mating upsets the equilibrium distribution of genotypes in a population. This will occur whether mate selection is positive or negative assortative.
What effect do assortative matings have on population?
By increasing homozygosity in this way, assortative mating also increases the population genetic variance for the traits that influence mate choice. In other words, assortative mating will lead to more extreme, and less intermediate, phenotypes than expected by chance.
Why does assortative mating not necessarily lead to a change in allele frequencies?
Non-random mating results in changes in the genotype frequencies in the population, i.e., how the alleles are put together into genotypes, but it does NOT change the allele frequencies themselves. Since genotype frequencies will be affected, non-random mating results in a deviation from Hardy-Weinberg equilibrium.
Is assortative mating is a type of pre or post zygotic reproduction isolation?
cydno have diverged to mimic the color patterns of different model taxa (Figure 3a), but strong assortative mating (preferential mating among individuals with similar phenotypes) based on the mimetic coloration results in substantial pre-zygotic isolation (Figure 3b).
Does assortative mating increase genetic diversity?
Assortative mating has been suggested to result in an increase in heritability and additive genetic variance through an increase in linkage disequilibrium.
What is assortative mating?
Assortative mating occurs when mates preferentially choose phenotypes like their own (positive assortative) or unlike their own (negative or disassortative mating). H. Richard Johnston, Stephanie L. Sherman, in Emery and Rimoin’s Principles and Practice of Medical Genetics and Genomics (Seventh Edition), 2019
What is the difference between negative assortative mating and Hardy-Weinberg proportions?
By contrast, negative assortative mating (where opposites attract and individuals prefer to mate with phenotypically different individuals) results in excess of heterozygotes. Population structure also causes departures from Hardy–Weinberg proportions.
What is an example of assortment in psychology?
In (positive) assortative mating, psychologically, behaviorally, or physically similar individuals pair up. Negative assortative, or disassortative, mating occurs as a result of attraction between dissimilar individuals. An example of positive marital assortment is the tendency of deaf persons to marry one another.
