A WALRUS, A MOUSE, AND A MAN WENT INTO A BAR…
18 July 2010
Let’s go back a bit. To 1549? No farther. 1337? No, not even warm. 5460 years ago that I posted about? No, farther still. Try 600 million years ago.
Scientists at Chicago have discovered that’s the likely date for the “common origin for male gametogenesis among metazoans”. Metazoans are basically all animals, you, me, sea anemones, flies, walruses, mice, cats, and, yes, those pipid frogs. Male metazoans have a common origin from which their male gametes, that is, sperm cells, derive.
Time to read my post on puny boundaries again, I think.
‘Widespread presence of human BOULE homologs among animals and conservation of their ancient reproductive function’ by Chirag SHAH et al in PLOS Genetics 15 July 2010. The quotation in paragraph 2 is taken from this report.
‘One sperm gene for all animals’ in Discovery News 16 July 2010