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Update on Bizzare Gender Guppy | 2 comments (2 topical, editorial, 0 hidden)

Thank you for sharing (none / 0) (#2)
by unclescott on Fri Oct 10, 2003 at 01:53:15 PM PST

your insights Phry. Lagler, et. al. must feel then thay guppies have x & y chromosomes.

I was surprised by a comment an ichthyologist made several years ago that a lot of aquarium fish had their sex determining genetic material located on several chromosomes. It had never been demonstrated that many of them had x or y chromosomes. This made them vulnerable to environmental changes which could produce proportionately more males or females.

Another study on platies suggested a third chromosome in the gender mix. I forget whether John Dawes alluded to it or if it was in Snellson/Meffe.

[ Parent ]

Update on Bizzare Gender Guppy | 2 comments (2 topical, 0 editorial, 0 hidden)

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