BIOL 226 LAB EXAM QUESTIONS AND
ALREADY PASSED ANSWERS.
Male Drosophila - Answer smaller in size
sex combs on legs
darker posterior
more blunt abdomen
genital arch
Female Drosophila - Answer larger
rounded sticking out abdomen
pointed bum
vaginal plate
egg - Answer has stalks that extend from egg to prevent it from sinking into the medium
1 day after the egg is laid, the larvae is hatched.
rested in metahphase 1 until fertilized
larvae - Answer white and segmented.
black mouth parts are visible at anterior ends
at this point- male testes are present and female ovaries
female ovary in larvae stage - Answer germ cells-8-12
male testes in larvae stage - Answer germ cells- 36-38
in the larvae stage - Answer eye antenna complex- sac structure having lumen
-wing discs are availble but the lumen disc has not yet developed
larvae grow and pass through - Answer 3 instars
, ovaries develop but only contain oogonia
3rd instar- the eye antenna complex
the third mature instar is used for - Answer divided into two parts
used for cytological examination of salivary gland chromosomes
pupa - Answer hours after the mature third instar, larvae crawls out of medium onto surface
and thickents
-forms pupae
pupa is a stationary brown structure
larvae goes through this to get to the pupa stage - Answer HISTOLYSIS- how tissues and organs
of adults are formed from imaginal discs
halfway through pupa stage - Answer -pigmentation begins to be deposited into compoun
eyes and testes
-eye and antenna discs are turned inside out
-ovaries attach to oviduct and tests to the vasa efferentia
-wings are formed and folded
last half of the pupa stage - Answer ovary has oocytes. STILL NO MATURE
adult fly - Answer 9-11 days later- metaphorsis is complete
the adult fly emerges from the - Answer puparium
within half a day - Answer adults are sexually mature and can mate
eyes of the fly - Answer compound and simple
compound eyes - Answer large eyes made up of ommatidia
ommatidia- honeycomb arrangements
ALREADY PASSED ANSWERS.
Male Drosophila - Answer smaller in size
sex combs on legs
darker posterior
more blunt abdomen
genital arch
Female Drosophila - Answer larger
rounded sticking out abdomen
pointed bum
vaginal plate
egg - Answer has stalks that extend from egg to prevent it from sinking into the medium
1 day after the egg is laid, the larvae is hatched.
rested in metahphase 1 until fertilized
larvae - Answer white and segmented.
black mouth parts are visible at anterior ends
at this point- male testes are present and female ovaries
female ovary in larvae stage - Answer germ cells-8-12
male testes in larvae stage - Answer germ cells- 36-38
in the larvae stage - Answer eye antenna complex- sac structure having lumen
-wing discs are availble but the lumen disc has not yet developed
larvae grow and pass through - Answer 3 instars
, ovaries develop but only contain oogonia
3rd instar- the eye antenna complex
the third mature instar is used for - Answer divided into two parts
used for cytological examination of salivary gland chromosomes
pupa - Answer hours after the mature third instar, larvae crawls out of medium onto surface
and thickents
-forms pupae
pupa is a stationary brown structure
larvae goes through this to get to the pupa stage - Answer HISTOLYSIS- how tissues and organs
of adults are formed from imaginal discs
halfway through pupa stage - Answer -pigmentation begins to be deposited into compoun
eyes and testes
-eye and antenna discs are turned inside out
-ovaries attach to oviduct and tests to the vasa efferentia
-wings are formed and folded
last half of the pupa stage - Answer ovary has oocytes. STILL NO MATURE
adult fly - Answer 9-11 days later- metaphorsis is complete
the adult fly emerges from the - Answer puparium
within half a day - Answer adults are sexually mature and can mate
eyes of the fly - Answer compound and simple
compound eyes - Answer large eyes made up of ommatidia
ommatidia- honeycomb arrangements
