The sex of the parent species determines the species of a hybrid offspring
The species and traits of a hybrid offspring are determined by complex genetic and chromosomal incompatibilities between parental genomes rather than simply the sex of the parent species.
The claim states that the sex of the parent species determines the species of a hybrid offspring. None of the retrieved papers support this assertion; instead, they explain hybrid formation, sterility, and divergence through genetic factors, chromosomal pairing failures, meiotic incompatibilities, and gene misregulation (e.g., PRDM9 interactions, karyotype divergence, and Haldane's rule). Therefore, the claim is refuted by the genomic mechanisms of hybridization.
Mukaj A, Piálek J, Fotopulosova V, Morgan AP, Odenthal-Hesse L, Parvanov ED, Forejt J. Prdm9 Intersubspecific Interactions in Hybrid Male Sterility of House Mouse.. 2020. https://doi.org/10.1093/molbev/msaa167
Paper [0] shows that hybrid sterility in mice is driven by specific allelic incompatibilities such as Prdm9, rather than simply the sex of the parent species.
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Marta A, Tichopád T, Bartoš O, Klíma J, Shah MA, Bohlen VŠ, Bohlen J, Halačka K, Choleva L, Stöck M, Dedukh D, Janko K. Genetic and karyotype divergence between parents affect clonality and sterility in hybrids.. 2023. https://doi.org/10.7554/elife.88366
Paper [1] demonstrates that hybrid outcomes depend on genomic and karyotype divergence across a phylogenetic spectrum rather than the parental sex determining the offspring species.
Fred G. Biddle, Brenda A. Eales, Wendy L. Dean. Haldane's rule and heterogametic female and male sterility in the mouse. 1994. https://doi.org/10.1139/g94-027
Paper [2] discusses hybrid sterility and Haldane's rule in terms of heterogamety and genetic interactions, not parental sex determining species outcome.
Bodelón A, Chillida V, de Oliveira DS, Vieira C, Guerreiro MPG. Male sterility in Drosophila hybrids revealed by a multi-generational transcriptomic analysis of genes and transposable elements in testes.. 2026. https://doi.org/10.1186/s12915-026-02566-y
Paper [7] attributes hybrid sterility and incompatibilities to gene misregulation, transposable elements, and transcriptomic changes in crosses.
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