Drosophila

germ band

refers to body of insect during development
germ band extension

refers to body lengthening during development
extended germ band
- the stage of maximus body lengthening
- phylotypic stage of insect development
phylotypic stage

developmental stage at which members of an animal group most resemble each other
thorax
- middle part of body
- has 3 segments:
- prothorax, mesothorax, metathorax
- all segments develop a pair of legs on ventral side
- meso and metathorax also develop a pair of wings on dorsal side
dipteran

has 2 wings
parasegments
- segmental divisions in the embryo
- not quite the same as segments seen in the larva and adult
inside insect body
- nerve cord: central nervous system
- on ventral side
- heart on dorsal side
- oxygen diffuses through tracheal tubes
helometabolous
how does this happen in drosophila
- undergoes complete metamorphosis
- egg hatches into larva
- larva molts twice (so 3 larval stages) then becomes a pupa: body is remolded to form the adult
- much of adult body formed from imaginal discs

Author

sabbyfish

244086

Card Set

Drosophila

Description

test 2

Updated

2013-10-31T04:54:39Z

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