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Sexual imprinting and speciation in two Peromyscus species.
Journal Article
Sexual isolation, a reproductive barrier, can prevent interbreeding between diverging populations or species. Sexual isolation can have a clear genetic basis; however, it may also result from learned mate preferences that form via sexual imprinting. Here...

The evolution of nesting behaviour in Peromyscus mice
Journal Article

Structures built by animals, such as nests, often can be considered extended phenotypes that facilitate the study of animal behaviour. For rodents, nest building is both an important form of behavioural thermoregulation and a critical component of...

Divergent genetic mechanisms lead to spiny hair in mammals
Journal Article
In humans, a single amino acid change (V370A) in the Ecdysoplasin A receptor (Edar) gene is associated with a unique hair phenotype in East Asian populations. Transgenic experiments in mouse show that this mutation enhances Edar signaling in vitro, which...

Sibling rivalry: Males with more brothers develop larger testes
Journal Article
When females mate with multiple partners in a reproductive cycle, the relative number of competing sperm from rival males is often the most critical factor in determining paternity. Gamete production is directly related to testis size in most species, and...

Diet-based assortative mating through sexual imprinting
Journal Article

Speciation is facilitated by “magic traits,” where divergent natural selection on such traits also results in assortative mating. In animal populations, diet has the potential to act as a magic trait if populations diverge in consumed food that...

The genetic basis of a social polymorphism in halictid bees
Journal Article
The emergence of eusociality represents a major evolutionary transition from solitary to group reproduction. The most commonly studied eusocial species, honey bees and ants, represent the behavioral extremes of social evolution but lack close relatives...

Linking a mutation to survival in wild mice.
Journal Article
Adaptive evolution in novel or changing environments can be difficult to predict because the functional connections between genotype, phenotype, and fitness are complex. Here, we make these explicit connections by combining field and laboratory...

The Tug1 locus is essential for male fertility
Journal Article
Several long noncoding RNAs (lncRNAs) have been shown to function as central components of molecular machines that play fundamental roles in biology. While the number of annotated lncRNAs in mammalian genomes has greatly expanded, their functions remain...