The whole-genome duplication events leading to jawed vertebrates

A diagram showing the evolution of vertebrate chromosomes from an invertebrate ancestor through two whole-genome duplication events (shown as starbursts). For simplicity, only one ancestral pair of chromosomes is shown. The study found that two now-extinct ancestors, alpha and beta, hybridized during duplication #2 to give rise to the jawed vertebrate lineage. After duplication, the beta chromosomes became more degraded than the more robust alpha chromosomes.

20 April 2020
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