Essential parts of the polar bear Y chromosome decoded

For the first time, a team of scientists, led by Prof. Axel Janke of the Senckenberg Research Center for Biodiversity and Climate, reconstructed part of the male chromosome in polar bears. The scientists were able to assign 1.9 million base pairs specifically to the polar bear Y chromosome. In their study, published today in the scientific journal Genome Biology and Evolution, they show that more than 100,000 years ago, the male polar bear lineages split and developed in two separate genetic groups.

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