No evidence of positive assortative mating for genetic quality in fruit flies

Assortative mating but no evidence of genetic divergence in a species characterized by a trophic polymorphism.

Disruptive selection is a process that can result in multiple subgroups within a population, which is referred to as diversification. Foraging-related diversification has been described in many taxa, but many questions remain about the contribution of such diversification to reproductive isolation and potentially sympatric speciation. Here, we use stable isotope analysis of diet and morphologic...

No evidence for genetic assortative mating beyond that due to population stratification.

Mating-induced recombination in fruit flies.

In traditional deterministic models the conditions for the evolution of sex and sexual behavior are limited because their benefits are context dependent. In novel and adverse environments both multiple mating and recombination can help generate gene combinations that allow for rapid adaptation. Mating frequency often increases in conditions in which recombination might be beneficial; therefore,...

No decline in assortative mating for educational level.

Education data from the Norwegian twin panel reveal no decline in the marital correlation for educational attainment for the past 35 years. Comparable marital correlations are foundfor British and American samples. A higher marital correlation is obtainedfor the parents of the Norwegian twins and the parents of their spouses, but this is an artifact. A twin's recall of his/her parents' educatio...

Assortative Mating on Education: A Genetic Assessment∗

We combine an instrumental variables approach –exploiting genetic variation in polygenic scores and controlling for population stratification– with a stochastic linear bi-dimensional matching model –which allows us to test the validity of the exclusion restriction. Individuals match on an additive index of overall marital attractiveness which has two components: an observable component (educati...