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By T. Ryan Gregory | December 10th 2008 08:55 PM | 3 comments | Print | E-mail | Track Comments
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About T. Ryan Gregory

I am an evolutionary biologist specializing in genome size evolution at the University of Guelph in Guelph, Ontario, Canada. Be sure to visit Evolver Zone


... Full Bio

Sometimes while doing science, one is struck by something in the same way that one is affected by beautiful art.

Not that these are the most amazing images ever (they weren't meant to be artistic, just routine work), but I enjoyed them. They're from a project on rotifers by one of my undergraduate thesis students. They're both of Adineta vaga: the first is of the whole animal (the pink spots are the DNA), the second is the musculature on a confocal laser microscope. (Photos by K. Ashforth).


Bonus:

Here are some pictures I took several years ago. A is an ovariole from the ovary of a vinegar fly (Drosophila melanogaster) and B is the same from a flea (Ctenocephalides felis).  The huge circles are nurse cells, which are very highly endopolyploid.



Comments

Becky Jungbauer's picture

Routine work or not, I am a sucker for scientific "art." Especially confocal laser microscopy. Pardon my ignorance, but is there an explanation for the DNA distribution pattern? (And thanks for sharing the images.)



T Ryan Gregory's picture
One of the things that we are looking at is the amount of DNA in the oocytes and nurse cells (you can see the latter, which are the large circles) -- these have more DNA than the rest of the body.

Becky Jungbauer's picture
My rotifer knowledge is severely lacking, but I can still appreciate the fascination you must have in solving this mystery. Very cool. (And if you look very closely, the nurse cells have little white caps and comfy shoes.)

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