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Science/nature/environment

fruitflies - where do they come from?

(13 Posts)
quizqueen Wed 19-Aug-20 23:10:51

Just have your vacuum cleaner close to hand. The ones in my house used to disappear behind the curtains

Suki70 Wed 19-Aug-20 22:49:23

annsixty 😀 If only the little devils had stayed still! The experiment concerned sex linked inheritance in Drosophila. I've only recently sent a book on the subject to a charity shop. Goodness knows why I kept it for 57 years.

annsixty Wed 19-Aug-20 22:28:39

The very idea of trying to sex fruit flies has captured my imagination.
I shall go to sleep happy tonight, pondering on that.

NfkDumpling Wed 19-Aug-20 22:25:28

But where do they come from *Varian? They're not to be seen until the weather gets hot and then the fruit bowl (In the dining room, nowhere near an outside door or open window) is suddenly smothered in them. So, I give the fruit a wash over and put it, fly free, in the fridge - and there's no flies in the dining room. Where did they go? They seem to conjure themselves from the air and vanish back into it again.

Suki70 Wed 19-Aug-20 22:18:58

Varian your post brought back memories of a Biology practical exam when I was at College. Can't remember the exact genetics question but to answer it we had to anaesthetise Drosophila with just enough ether to knock them out, too much and they would have died. Then, under a microscope we had to sex them, noting eye colour and other characteristics. The lab was full of escapees who had recovered too early from the ether, scuppering the experiment, together with sighs and mutterings from the students.

grannyqueenie Wed 19-Aug-20 21:02:57

I’ve had plagues of these critters in the past and fair few around at the moment. Have partly solved it by putting little sticky strips beside my many houseplants and on my window sills. I'm amazed and slightly disgusted at how many the traps catch. Might have a go at your solution grannygravy.

jenpax Wed 19-Aug-20 20:24:05

You learn something every day Varian!

varian Wed 19-Aug-20 19:26:54

Fruit flies (drosophila) are a very useful laboratory animal used widely in the study of genetics because they have a life cycle of fourteen days so they work well with a university timetable.

Chewbacca Wed 19-Aug-20 18:22:18

Hmmmm devious GrannyGravy, I like it! A method worth pinching!

GrannyGravy13 Wed 19-Aug-20 17:50:52

I put out a shallow bowl with a solution of vinegar and sugar, cover with cling film and pierce film with lots of little holes. The silly flies are attracted to the solution fly in but cannot get out.

Ellianne Wed 19-Aug-20 17:48:09

I cut up a pineapple last night and they were everywhere. I hadn't noticed them much before.

BlueBelle Wed 19-Aug-20 17:47:09

Yes had a banana going off which I d forgotten and they were having a field day tiny tiny fast little buggers

Fennel Wed 19-Aug-20 17:44:48

They drive me mad - I just sit down at my 'puter and one of them tries to join in.
Getting itself tangled in my hair and nipping around my mouth and eyebrows.
I think they're attracted by the sudden appearance of light.
If you try to click them they're usually faster.
Anyone else seen them? Maybe I'm losing it.