[Polyploidy and polyteny in the trophoblast cells of the mink].
According to cytophotometry, trophoblast cells in the mink placenta are both diploid and polyploid, the ploidy level ranging from 2c to 64c. A great number of mink trophoblast cells were seen to divide mitotically. In addition to the ordinary mitotic figures, polyploid mitoses as well as abnormal mitotic figures were observed. Non-classic polytene chromosomes, peculiar to the mammalian trophoblast, appeared in the mink trophoblast cells to have the highest ploidy. A relatively low ploidy degree is due, probably, to a lesser invasive activity of the mink trophoblast cells as compared to the rodent giant trophoblast cells.
Zybina
E V
EV
Zybina
T G
TG
Isakova
G K
GK
Kiknadze
I I
II
Shteĭn
G I
GI
D000818:Animals; D002467:Cell Nucleus / Q000737:chemistry; D002875:Chromosomes / Q000648:ultrastructure*; D003592:Cytophotometry / Q000379:methods; D004247:DNA / Q000032:analysis; D005260:Female; D008907:Mink / Q000235:genetics*; D010920:Placenta / Q000648:ultrastructure; D011123:Polyploidy; D014327:Trophoblasts / Q000648:ultrastructure*
D004247:DNA
Poliploidiia i politeniia v kletkakh trofoblasta norki.