insect development. spermatogenesis 2n n n n nn n germarium zone of growth zone of maturation zone...
TRANSCRIPT
Spermatogenesis
2N
2N
N N
N N N N
Germarium
Zone of Growth
Zone of Maturation
Zone of Transformation
Oogenesis
Oogonium
Mitosis to produce more germ cells
2N
2N Primary oocyte(meiosis I prophase - arrested - present at birth)
N
Complete meiosis I
Secondary oocyte(arrested at metaphase of meiosis II)
N Ovum
Onset of meiosis I
Ovulation
First polar body
Second polar body
Structure of Egg
micropyle
aeropyle
yolk spheres
nucleus
nuclear cytoplasm
vitelline membrane
periplasm (cytoplasm)
chorion
polar granules
Does female actually get the nutrients?
Inject male with radioactive protein
Spermatophore takes up
radioactive protein
Spermatophore passed to female
Eggs contain radioactive protein
Heart
Ectoderm
fat body
tracheal invagination
somatic muscles
Ventral nerve cord
mesoderm
endoderm
Gut
Hemocoel