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by Nick Atkinson

NEWS ANALYSIS

Platypus has 10 sex chromosomes

Email: Nick Atkinson - nwa@entangled.org
News from The Scientist 2004, 5(1):20041028-01

Published 28 October 2004

A team of scientists from Australia and the United Kingdom has finally elucidated the strange sex chromosome system of the duck-billed platypus. The first study, the findings of which are published this week in PNAS, demonstrates that the platypus has 10 sex chromosomes, rather than the single pair usually found in mammals. Results of a second study, appearing this week in Nature, detail the way the chromosomes segregate during male meiosis to determine the sex of the zygote.


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