(n.) The formation of a bud in place of a fertilized ovule or oospore.
Example Sentences:
(1) It was concluded that they had developed by apogamy, and therefore did not require plasma membrane bound mating receptors, cell fusion, or zygote formation.
Syngamy
Definition:
Example Sentences:
(1) Enucleation was completed in all embryos; syngamy occurred in one embryo, but cleavage was not observed.
(2) With the appropriate incubation in a mitotic inhibitor, syngamy is prevented and the sperm- and egg-derived chromosomes remain as separate clusters.
(3) and secondarily may function as an early pairing mechanism during syngamy.
(4) The maternal effect locus fs(1) Ya is required for the fusion of the apposed sperm and egg pronuclei (syngamy) following fertilization in Drosophila.
(5) Sea urchin eggs were fertilized, stripped of their fertilization envelopes, and fragmented before syngamy.
(6) The transfer of fertilized eggs to 600 microM 6-DMAP within 4 min following insemination inhibits pronuclear migration and syngamy.
(7) Heat shock of pre-syngamy eggs also failed to increase the production of genetic mosaics.
(8) Then the grandii chromosomes degenerate (1st polar body), while the rossius chromosomes divide further to produce two groups of n autodiads (2C each); one of them degenerates (2nd polar body), and the other is ready to perform syngamy (female pronucleus).
(9) One oocyte arrested at syngamy, while two additional oocytes cleaved to four cells each.
(10) These results are consistent with the progeny being an F1 in a diploid mendelian genetic system involving meiosis and syngamy.
(11) In few cases oocytes with 1 pronucleus and the swollen sperm head or with syngamy or polyspermic were found.
(12) We report a study of fertilization, syngamy and embryonic development in 14 oocytes from a woman with four previous pregnancies involving complete hydatidiform moles.
(13) Syngamy appears to take place by an engulfing action, and no evidence was found of a 'membrane-fusion' kind of conjugation.
(14) At later stages, from syngamy (40 min) up to nuclear envelope breakdown (90 min), 6-DMAP affects neither cortical microtubule organization nor the state of chromatin condensation but it precludes nuclear envelope breakdown and entry into mitosis.
(15) We demonstrate the presence of centrioles in fertilized human oocytes at syngamy.
(16) It can be inferred that trypanosomes undergo meiosis during their developmental cycle in the tsetse fly's salivary glands and syngamy shortly after cyclic transmission.
(17) This sexual event involves meiosis and syngamy, but the order of these processes and the sexual stages involved are not yet known.
(18) Limited observations were also made on meiosis in the oocyte, penetration of the oocyte by sperm, formation of the ovum, syngamy and zygote formation.
(19) Male and female derived chromosome complements from first-cleavage embryos were analysed before syngamy for cytogenetic abnormalities.
(20) Syngamy (pronuclear fusion) is not observed; rather the adjacent paternal and maternal chromosome sets first meet at metaphase.