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Welcome to the World of Fruit Fly Genetics. This is a *female* fruit fly Notice the tiger-striped abdomen and the simple tag-like tip on the abdomen. The tip at the end of the female abdomen is the excretory opening. Just proximal to this opening is the female genital opening. Female

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Welcome to the Worldof

Fruit Fly Genetics


This is a *female* fruit fly

Notice the tiger-striped abdomen and the

simple tag-like tip on the abdomen.


The tip at the end of the female abdomen is the excretory opening.

Just proximal to this opening is the female genital opening.

Female

Genitalia


This is a mature male fruit fly opening.

Mature males have a prominent black abdominal end.

Males also have tiny “sex combs” on their front pair of legs.


Here’s a close up of the male genital region. opening.

Notice the metallic sheen of the genitals.


One male and one female opening.

Find their distinguishing features.


Ventral view of a male and female opening.

Find their distinguishing features


Female laying opening.

an egg


Notice the relatively larger size and opening.

lighter pigmentation

of the

virgin female as compared with the

mature female


Tiny fly eggs hatch into tiny worm-like opening.larvae. The larvae eat and grow in length

and girth. The maximum size

of the larval stage is called

the third instar.

This larval stage

becomes a pupa.

Anus

This is a third instar larva

prior to pupation

Mouth


Larva to pupa stages
Larva to Pupa Stages opening.

Larvae are mobile

Pupal

stages

With the onset of pupation the worm-like larva contracts and a

parchment-like pupa case hardens around the metamorphosing fly.


Fly metamorphosis in pupa
Fly metamorphosis in pupa opening.

When the fly emerges from the

pupal case the wings are still

wet and folded.


When flies are newly hatched opening.

their wings are still damp

and folded.

Is this a male

or a female?

This is a male.

Pigmentation has not developed.


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