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Updated: Jun 16, 2026

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR
Published on: July 11, 2025
Patterns of neutral genetic variation on recombining sex chromosomes
Mark Kirkpatrick1, Rafael F Guerrero, Samuel V Scarpino
1Section of Integrative Biology, University of Texas, Austin, Texas 78712, USA. kirkp@mail.utexas.edu
Abstract:
Many animals and plants have sex chromosomes that recombine over much of their length. Here we develop coalescent models for neutral sites on these chromosomes. The emphasis is on expected coalescence times (proportional to the expected amount of neutral genetic polymorphism), but we also derive some results for linkage disequilibria between neutral sites. We analyze the standard neutral model, a model with polymorphic Y chromosomes under balancing selection, and the invasion of a neo-Y chromosome. The results may be useful for testing hypotheses regarding how new sex chromosomes originate and how selection acts upon them.
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