ANSC 333 Exam 4
syngamy - ANS-fusion of male and female pronuclei
zygote - ANS-single cell embryo
blastomere - ANS-two-celled embryo
same size as zygote, represents 1/2 of the single-celled zygote - ANS-blastomere
characteristics
zygote undergoes series of mitotic divisions, only replicating the DNA- no production of
cytoplasm - ANS-What does the zygote undergo?
morula - ANS-embryos with >32 cells
oviduct - ANS-Where does all early embryonic development occur?
compaction - ANS-Once the morula reaches 64 cells, what does it initiate?
compaction - ANS-process through which cells in the morula begin to stick together
totipotent - ANS-if a cell can become any cell that is needed, blastomeres
cells on the inside of the morula form gap junctions- become the fetus
cells lining the zona pellucida form tight junctions- becomes the placenta - ANS-When
compaction occurs, cells are no longer totipotent. How do they differentiate?
pluripotent - ANS-Cell has made at least one decision, but is not yet fully differentiated,
occurs during and after compaction
uterus - ANS-where does compaction occur?
blastocyst - ANS-blastocoele has a defined fluid filled cavity inside it
trophoblast cells - ANS-Cells with the tight junctions found in the outer cell
inner cell mass - ANS-Cells with gap junctions found among the inner cell
, Chorion - ANS-What will the trophoblast cells form?
embryo - ANS-What will the inner cell mass form?
fetal side of the placenta - ANS-What is the chorion?
pump water into blastocoele to weaken the zona pellucida - ANS-What doe the
trophoblast cells do?
hatch - ANS-What is it called the embryo leaves the zona pellucida?
piazzo drill to rupture the zona pellucida - ANS-What must be and why when IVF and
cloned embryo cells are growing?
implantation - ANS-embryo physically attaches itself to the uterine mucosa
determines the type of placenta each species will have
occurs at day 5 or 6
embryo burrows its way into the endometrium - ANS-Describe implantation in women
embryo adheres to the endometrium
day varies by species - ANS-Describe implantation in livestock species
primates- burrowing implantation - ANS-In what species doe tubal and ectopic
pregnancies occur?
tubal pregnancy - ANS-undergoes implantation in the oviduct, dangerous to mom
ectopic pregnancy - ANS-embryo goes out infundibulum and finds vascular source in
abdomen
fatal for mom and baby
hormonal profile of oviduct - ANS-What controls the movement of the embryo in the
oviduct?
day 19-20 - ANS-At what day does implantation occur in cows?
ART - ANS-Why does the location of the embryo matter?
- still has zona pellucida to protect it- prevent damage when sucked up
syngamy - ANS-fusion of male and female pronuclei
zygote - ANS-single cell embryo
blastomere - ANS-two-celled embryo
same size as zygote, represents 1/2 of the single-celled zygote - ANS-blastomere
characteristics
zygote undergoes series of mitotic divisions, only replicating the DNA- no production of
cytoplasm - ANS-What does the zygote undergo?
morula - ANS-embryos with >32 cells
oviduct - ANS-Where does all early embryonic development occur?
compaction - ANS-Once the morula reaches 64 cells, what does it initiate?
compaction - ANS-process through which cells in the morula begin to stick together
totipotent - ANS-if a cell can become any cell that is needed, blastomeres
cells on the inside of the morula form gap junctions- become the fetus
cells lining the zona pellucida form tight junctions- becomes the placenta - ANS-When
compaction occurs, cells are no longer totipotent. How do they differentiate?
pluripotent - ANS-Cell has made at least one decision, but is not yet fully differentiated,
occurs during and after compaction
uterus - ANS-where does compaction occur?
blastocyst - ANS-blastocoele has a defined fluid filled cavity inside it
trophoblast cells - ANS-Cells with the tight junctions found in the outer cell
inner cell mass - ANS-Cells with gap junctions found among the inner cell
, Chorion - ANS-What will the trophoblast cells form?
embryo - ANS-What will the inner cell mass form?
fetal side of the placenta - ANS-What is the chorion?
pump water into blastocoele to weaken the zona pellucida - ANS-What doe the
trophoblast cells do?
hatch - ANS-What is it called the embryo leaves the zona pellucida?
piazzo drill to rupture the zona pellucida - ANS-What must be and why when IVF and
cloned embryo cells are growing?
implantation - ANS-embryo physically attaches itself to the uterine mucosa
determines the type of placenta each species will have
occurs at day 5 or 6
embryo burrows its way into the endometrium - ANS-Describe implantation in women
embryo adheres to the endometrium
day varies by species - ANS-Describe implantation in livestock species
primates- burrowing implantation - ANS-In what species doe tubal and ectopic
pregnancies occur?
tubal pregnancy - ANS-undergoes implantation in the oviduct, dangerous to mom
ectopic pregnancy - ANS-embryo goes out infundibulum and finds vascular source in
abdomen
fatal for mom and baby
hormonal profile of oviduct - ANS-What controls the movement of the embryo in the
oviduct?
day 19-20 - ANS-At what day does implantation occur in cows?
ART - ANS-Why does the location of the embryo matter?
- still has zona pellucida to protect it- prevent damage when sucked up
