|
Review questions
1.
Fertilization is the union of haploid sperm and egg. What
are the two
functions of
fertilization?
2. What
ensures that eggs are fertilized only by sperm of the same
species
(species-specificity)?
3. What
might happen if an egg were fertilized by more than one
sperm
(polyspermy)?
4.What
is the fast block to polyspermy?
5. What
causes the cortical reaction?
6 How
could you confirm that all of the necessary
Ca+2comes
from internal
stores?
7. What
is the slow block to polyspermy?
8. The
fertilization membrane is anchored to the plasma membrane by
protein
"posts". Proteases from the
cortical granules cleave the posts allowing the
fertilization membrane to
elevate. What would be possible consequences of
inhibiting this protease
activity?
9. What
other changes are triggered in the
eggby the increase in
Ca+2
concentrations in the
cytoplasm?
© 2001 Cebra-Thomas
Last Modified: 8 January,
2001
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