prophasen.adj.
/ˈprəʊfeɪz/, U.S. /ˈproʊˌfeɪz/ Cell Biology.
A. n.
The first stage in a mitotic or meiotic nuclear division, preceding prometaphase, during which chromatin condenses into chromosomes which become visible as paired chromatids, and the nuclear envelope disappears. Prophase of the first meiotic division is divided into leptotene, zygotene, pachytene, diplotene, and diakinesis.
ΘΚΠ
the world > life > biology > biological processes > genetic activity > [noun] > stages of mitosis or meiosis
resting stage1810
prophase1884
anaphase1887
metaphase1887
synapsis1895
telophase1895
maturation division1896
postsynapsis1898
strepsinema1900
synizesis1905
interkinesis1906
pachynema1909
telosynapsis1909
leptonema1911
metasyndesis1911
strepsitene1911
zygonema1911
zygotene1911
leptotene1912
pachytene1912
interphase1913
telosyndesis1920
prometaphase1931
dictyotene1957
dictyate1958
1884 Jrnl. Royal Microsc. Soc. 4 ii. 714 In both [plants and animals] we find that in the ‘prophases’ of nuclear division cytoplasm is collected at the future poles of the cell-nucleus.
1903 Bot. Gaz. 35 250 The first division in Salamandra is characterized by a long period of growth of the cell and nucleus during the prophase.
1970 E. J. Ambrose & D. M. Easty Cell Biol. ix. 296 In late prophase..the spindle develops and the asters move apart.
1995 C. Nielsen Animal Evol. xiii. 103 The oocytes develop to the first meiotic prophase in the ovary and are then released into the coelom where ripening takes place.
B. adj.
Designating the first stage of nuclear division; of or relating to a cell in prophase.
ΚΠ
1898 Bot. Gaz. 25 336 (caption) A single rounded pollen mother cell with its nucleus in the prophase stage.
1940 Proc. National Acad. Sci. U.S.A. 26 344 Lampbrush chromosomes..consist of a central single or double chromonema with chromomeres, which, in ovocytes, is undoubtedly the stretched prophase chromosome.
1989 E. Lawrence Guide Mod. Biol. viii. 245 At the prophase stage of mitosis each chromosome consists of two identical copies—daughter chromatids—lying side by side and still joined at the centromere.
Derivatives
proˈphasic adj.
ΘΚΠ
the world > life > biology > biological processes > genetic activity > [adjective] > stages of mitosis or meiosis
homotypical1870
heterotypical1888
homoeotypical1888
heterotypic1889
homoeotypic1889
skein1889
heterotype1895
homotype1895
synaptic1895
synaptenic1900
presynaptic1903
homotypic1904
dictyate1905
post-meiotic1905
premeiotic1905
telophasic1907
postsynaptic1909
metaphase1912
prophasic1912
telosynaptic1912
interkinetic1927
synapsed1931
synizetic1931
interphasic1948
1912 Bot. Gaz. 53 305 The nuclei and chromosomes of the pollen mother cells are so small that many of the prophasic phenomena could not be observed with accuracy.
1993 Botanica Acta 106 183 Euchromatin condensation characteristics in prophasic chromosomes.
This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).
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n.adj.1884