| Value |
6000
unitless
Range: Table - link unitless
|
| Organism |
Fruit fly Drosophila melanogaster |
| Reference |
Marko Zalokar and lnge Erk, Division and migration of nuclei during
early embryogenesis of Drosophila melanogaster, J. Microsc. Biol. Cell. 25 (1976), pp. 97–106 p.98 right column and p.99 table 1 |
| Method |
p.98 left column: "The eggs were then dehydrated and mounted in epon on microscope slides." "After exposure to the drugs,
the eggs were incubated for the stated time in paraffin oil
until fixation." |
| Comments |
"After nuclei have reached the periphery of the egg to form syncytial blastoderm their total number did not increase further at the same rate. A certain number of nuclei (around 18) migrated into pole cells, where they divided once more at a different rate than that of blastoderm nuclei. Another group of nuclei (about 100) remained in the center of the egg to form yolk nuclei, which continued to divide with a different rhythm. At stage 10, where there should be 512 nuclei altogether, less than 400 nuclei constitute the blastoderm. These nuclei continue to divide synchronously 4 times (not 3 times as has been believed until now) to produce about 6 000 nuclei in the last stage of the blastoderm." |
| Entered by |
Uri M |
| ID |
106463 |