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Mutations that increase the number of segments

Community and Forum → Other questions. Insects topics → Mutations that increase the number of segments

Alexy, 04.01.2007 22:01

Are there any known deformities in drosophila or other insects when there are more segments: for example, one of the limb-bearing segments repeats a second time? Maybe this happens for non-limb-bearing segments?

Comments

05.01.2007 8:10, Mylabris

Known. Sometimes even instead of antennae, legs grow out.
If you are interested, read about hox genes. It's their fault.

05.01.2007 16:44, Alexy

When the legs grow out of the antennae, the segments don't get any bigger.

06.01.2007 8:19, Mylabris

They are also responsible for this.

07.01.2007 1:51, Alexy

I wish you and all the participants a Merry Christmas!

Thank you for your answers!
Is it strange that the ugly forms of drosophila or other insects with 4 pairs of legs were not picked up by selection?

07.01.2007 9:46, Mylabris

Nothing strange - such mutants have no chance to survive in nature.

07.01.2007 18:27, Chromocenter

Are there any known deformities in drosophila or other insects when there are more segments: for example, one of the limb-bearing segments repeats a second time? Maybe this happens for non-limb-bearing segments?

There are such-for example, four-winged fruit flies.
They are not fixed because such rearrangements lead to too much rearrangement of the body.

07.01.2007 19:57, Mylabris

Or rather, the restructuring of physiology, and as a result, the inability to continue the race..

10.02.2007 16:05, Alexy

So will there be changes in other body systems? Not just wings or legs?
If so, which ones, for example, in the case of the four-winged fruit fly?

Or just the wings of a four-winged fruit fly interfere with each other's movement?

(Actually, in the example of the four-winged fruit fly, it is not the appearance of a new pair of wings on a different segment, but the return of rudiments of wings to their ancient shape. So that's not really relevant)

This post was edited by Alexy - 22.06.2007 15: 20

22.06.2007 15:21, Alexy

So after all, is it possible to find an article somewhere about changing the number of segments in arthropods?

28.05.2009 13:48, Alexy

There are such-for example, four-winged fruit flies.
It is probably not the number of segments that increases, but the second normal wings (which are rudimentary in all diptera) are restored?

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