# T-Rex vision

**URL:** <https://boards.straightdope.com/t/t-rex-vision/374197>\
**Category:** Factual Questions\
**Created:** [September 26, 2006, 12:14pm UTC](https://boards.straightdope.com/t/t-rex-vision/374197 "2006-09-26T12:14:36Z")\
**Posts on this page:** 2\
**Page:** 3

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**Author:** ![chorpler](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chorpler/32/2888_2.png) [@chorpler](https://boards.straightdope.com/u/chorpler)\
**Post date:** [September 27, 2006, 11:08am UTC](https://boards.straightdope.com/t/t-rex-vision/374197/41 "2006-09-27T11:08:14Z")

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[QUOTE=Colibri]  
Well well well. To my surprise, there actually is support in the literature for this. The West African Reed Frog _Hyperolius viridiflavus_ has been found to undergo spontaneous [sex reversal](http://links.jstor.org/sici?sici=0045-8511%2819891227%293%3A1989%3A4%3C1024%3APSCITR%3E2.0.CO%3B2-S&size=LARGE), though it was from female to male. Otherwise such sequential hermaphroditism is known in vertebrates only in fish. So there actually is a small amount of logic to this one.  
[/quote]

Which is funny, because the dinosaurs were ALSO changing from female to male. I wonder why Dr. Grant would say “male to female” in the script.

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**Author:** ![CalMeacham](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/calmeacham/32/35_2.png) [@CalMeacham](https://boards.straightdope.com/u/CalMeacham)\
**Post date:** [September 27, 2006, 12:00pm UTC](https://boards.straightdope.com/t/t-rex-vision/374197/42 "2006-09-27T12:00:07Z")

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Couldn’t find my copy of JP last night, but I’ll take **mstay** and **Darwin’s Finch** ’s word on it. Coulda sworn that they glossed over the "frog DNA’ explanation in the movie, but I stand by my assertion that it’s still pretty dumb.

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