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the claim

Genetic recombination slows the accumulation of deleterious mutations in sexual populations

the verdict
SUPPORTED
the evidence backs this
Recorded sources
6 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that genetic recombination slows the accumulation of deleterious mutations in sexual populations?

Yes. Multiple evolutionary and genomic studies demonstrate that genetic recombination counters Muller's ratchet, allowing sexual populations to purge deleterious mutations more effectively than asexual ones.

Verdict: SUPPORTED · 6 sources for, 0 against · Last checked

The analysis

The retrieved papers consistently support the claim that sexual recombination helps populations avoid or mitigate the accumulation of deleterious mutations (Muller's ratchet), whereas a lack of recombination in asexual or bottlenecked populations leads to fitness loss and genetic load. No papers refute this claim.

Evidence for · 6
Mutation accumulation in space and the maintenance of sexual reproduction
2006
The study shows that spatial processes and local competition explain the maintenance of sexual reproduction as a mechanism for purging deleterious mutations.
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Salathé, M., Salathé, R., Schmid‐Hempel, P., & Bonhoeffer, S. (2006). Mutation accumulation in space and the maintenance of sexual reproduction. doi.org. https://doi.org/10.1111/j.1461-0248.2006.00942.x

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More for · 5
Genome expansion in early eukaryotes drove the transition from lateral gene transfer to meiotic sex
2020
The research demonstrates that recombination length counters Muller's ratchet and prevents the accumulation of deleterious mutations in evolving genomes.
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Colnaghi, M., Lane, N., & Pomiankowski, A. (2020). Genome expansion in early eukaryotes drove the transition from lateral gene transfer to meiotic sex. doi.org. https://doi.org/10.7554/eLife.58873

Host range expansion of asexual parasite can be explained by loss of adaptions in Muller's Ratchet.
2025
The findings indicate that asexual lineages accumulate deleterious mutations, reinforcing the essentiality of sexual recombination in eukaryotes.
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S, T., C, v. O., SM, C., F, W., B, B., E, N., M, N., BRE, A., SJ, E., L, B., M, L., S, S., RB, G., & AR, J. (2025). Host range expansion of asexual parasite can be explained by loss of adaptions in Muller's Ratchet.. doi.org. https://doi.org/10.1038/s41467-025-65843-4

Uniparental Inheritance and Recombination as Strategies to Avoid Competition and Combat Muller’s Ratchet among Mitochondria in Natural Populations of the Fungus Amanita phalloides
2023
Uniparental inheritance exposes organelles to Muller's ratchet, highlighting recombination as a strategy to alleviate this mutation accumulation.
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Wang, Y., Elmore, H., & Pringle, A. (2023). Uniparental Inheritance and Recombination as Strategies to Avoid Competition and Combat Muller’s Ratchet among Mitochondria in Natural Populations of the Fungus Amanita phalloides. doi.org. https://doi.org/10.3390/jof9040476

Genomic consequences of residual recombination in a hybrid apomictic hickory complex.
2026
The study reveals that residual sex and recombination mitigate mutation accumulation and reduce realized mutation loads in asexual systems.
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WP, Z., S, G., XX, P., M, K., DY, Z., M, L., & WN, B. (2026). Genomic consequences of residual recombination in a hybrid apomictic hickory complex.. doi.org. https://doi.org/10.1038/s41467-026-68867-6

Effects of mode of reproduction on genetic polymorphism and divergence in wild yams (Dioscoreaceae: <i>Dioscorea</i>).
2025
Results show that primarily asexual yam species exhibit an accumulation of deleterious mutations due to a reduced efficacy of natural selection.
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X, W., QH, F., ZH, Z., ZQ, Z., J, C., G, C., DZ, L., H, W., & W, Z. (2025). Effects of mode of reproduction on genetic polymorphism and divergence in wild yams (Dioscoreaceae: <i>Dioscorea</i>).. doi.org. https://doi.org/10.1016/j.pld.2024.09.009

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What does the evidence say?

The retrieved papers consistently support the claim that sexual recombination helps populations avoid or mitigate the accumulation of deleterious mutations (Muller's ratchet), whereas a lack of recombination in asexual or bottlenecked populations leads to fitness loss and genetic load. No papers refute this claim.

Receipt History
first checked04 Aug 2026
judged → SUPPORTED · 8404 Aug 2026
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