Genetics

Hybrid strains make insidious parasite more dangerous

Researchers at Karolinska Institutet in Sweden have mapped how the parasite Trypanosoma cruzi forms new variants that are more effective at evading the immune system and causing disease. Their findings can give rise to new ...

Genetics

Human egg cells are imperfect surprisingly often

More than 7% of human oocytes contain at least one exchangeless chromosome pair, demonstrating a remarkably high level of meiotic recombination failure, finds a study appearing December 10 in the American Journal of Human ...

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