Evolutionary biologists glimpse early stages of Y-chromosome degeneration

In many species, X and Y chromosomes determine whether an individual develops into a male or female. This sex determination system has evolved multiple times and a striking feature of its evolution is that Y chromosomes have lost many genes over time. What isn't well understood is what happens to them during this evolution. Now researchers have been able to study the early stages of degeneration, by investigating the process in plants.

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