Metaphases in sequential Giemsa-C banding analysis a-a’ female of the P. antarcticus b-b' female of the P. papua, c-c' female and d-d' male of P. adeliae. The arrows show the sex chromosomes Z, Z2 and W.

  Part of: Gunski RJ, Cañedo AD, Garnero ADV, Ledesma MA, Coria N, Montalti D, Degrandi TM (2017) Multiple sex chromosome system in penguins (Pygoscelis, Spheniscidae). Comparative Cytogenetics 11(3): 541-552.  

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