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Callosobruchus maculatus beetle

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Callosobruchus maculatus beetle

Female and a male (illustrating the size change in response to selection) Callosobruchus maculatus beetle, as well as their host plant Vigna radiata.
Paula Vasconcelos
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Paula Vasconcelos
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2480 x 3508, 3.3 MB
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  • Callosobruchus maculatus beetle and their host plant Vigna radiata. Credit: Paula Vasconcelos

    Male Y chromosome facilitates the evolution of sex differences in body size

    Females and males differ in many ways and yet they share the same genome. The only exception is the male Y chromosome. Using beetles as a study system, new research from Uppsala University, now published in Nature Ecology & Evolution, shows that despite of the Y chromosome containing very few genes, it can dramatically change male body size and thus facilitate the evolution of sex differences.