female pronucleus


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pronucleus

 [pro-noo´kle-us]
the haploid nucleus of a germ cell.
female pronucleus the haploid nucleus of the fully mature oocyte, which loses its nuclear envelope and liberates its chromosomes to meet the synapsis with those from the male pronucleus.
male pronucleus the nuclear material of the head of a spermatozoon, after it has penetrated the oocyte and acquired a pronuclear membrane.

female pronucleus

the nucleus of the ovum after fertilization but before the fusion of nuclear material from the sperm. The pronucleus is larger than the normal nucleus and has a diffuse appearance.

pronucleus

pl. pronuclei; the haploid nucleus of a sex cell.

female pronucleus
the haploid nucleus of the fully mature ovum which loses its nuclear envelope and liberates its chromosomes to meet the synapsis with those from the male pronucleus.
male pronucleus
the nuclear material of the head of a spermatozoon, after it has penetrated the ovum and acquired a pronuclear membrane.
References in periodicals archive ?
The difference in percentages of female pronucleus formation between activated and non-activated oocytes in all experimental groups were significant.
For example, in sea urchins the sperm aster extends toward the female pronucleus and is thought to effect the migration of the two pronuclei (Zimmerman and Zimmerman, 1967; Longo and Anderson, 1968; Longo, 1976; Schatten, 1981; Bestor and Schatten, 1981; Sluder et al.