genomics

  • What Made The Y Chromosome So Tiny?

    What Made The Y Chromosome So Tiny?

    The Y chromosome, a chunk of genetic code that is unique to male animals, isn’t just physically smaller than the X. It also contains far fewer genes. The X has more than 1000 genes, while the Y has fewer than 200 — and most of them don’t even work. Why do men have this odd,…