Publications by authors named "Justin Merondun"
Article Synopsis
- Sex-limited polymorphism, which is the presence of different traits in males and females, has been observed in various species, including humans, but its genetic and evolutionary mechanisms are not fully understood.
- The common cuckoo is highlighted for its female-only color variation, where females can be either gray or rufous, influenced by negative frequency-dependent selection, which protects the rarer morph from male harassment and host species conflict.
- Research indicates that this color variation is genetically linked to a female-restricted genome and shares ancestry with a closely related species, the oriental cuckoo, demonstrating how sex-specific traits can arise and persist across different species.
The evolution of genetic sex determination is often accompanied by degradation of the sex-limited chromosome. Male heterogametic systems have evolved convergent, epigenetic mechanisms restoring the resulting imbalance in gene dosage between diploid autosomes (AA) and the hemizygous sex chromosome (X). Female heterogametic systems (AAf Zf, AAm ZZm) tend to only show partial dosage compensation (0.
View Article and Find Full Text PDFDetermining the molecular signatures of adaptive differentiation is a fundamental component of evolutionary biology. A key challenge is to identify such signatures in wild organisms, particularly between populations of highly mobile species that undergo substantial gene flow. The Canada lynx (Lynx canadensis) is one species where mainland populations appear largely undifferentiated at traditional genetic markers, despite inhabiting diverse environments and displaying phenotypic variation.
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