pronucleus
Americannoun
-
pronuclei
plural
noun
Other Word Forms
Noun Inflected Forms
Etymology
Origin of pronucleus
From New Latin, dating back to 1875–80; see origin at pro- 1, nucleus
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
The egg is then exposed to a chemical that causes the remaining pronucleus to replicate, thus giving the cell a full complement of genes.
From Time Magazine Archive
As this is in all probability derived entirely from the nucleus of the spermatozoon, we should be almost justified in calling the nucleus of the spermatozoon the male pronucleus.
From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various
Contraction of the skein, and formation of two U-or V-shaped chromatin fibres in each pronucleus.
From Darwin, and After Darwin (Vol. 1 and 3, of 3) An Exposition of the Darwinian Theory and a Discussion of Post-Darwinian Questions by George John Romanes
Only the female pronucleus is shown in this figure.
From Darwin, and After Darwin (Vol. 1 and 3, of 3) An Exposition of the Darwinian Theory and a Discussion of Post-Darwinian Questions by George John Romanes
As soon as the nucleus of the spermatozoon, now known as the male pronucleus, reaches the interior of the egg, it enlarges and becomes similar in appearance to the female pronucleus.
From Being Well-Born An Introduction to Eugenics by Michael F. Guyer
In seven of the zygotes that were microinjected with sgRNA2b–Cas9, the pronuclei had already faded after thawing, showing that they had exited S phase and were undergoing syngamy.
From Nature ● Sep. 19, 2017
The pronuclei then migrate toward each other, their nuclear envelopes disintegrate, and the male- and female- derived genetic material intermingles.
From Textbooks ● Jun. 19, 2013
The two haploid nuclei derived from the sperm and oocyte and contained within the egg are referred to as pronuclei.
From Textbooks ● Jun. 19, 2013
If the oocyte is fertilized, Ramos will see the formation of two pronuclei, then the fusion of the diploid cell, or zygote.
From Slate ● May 23, 2012
The pronuclei have come into contact, and the spindle-system is now arranged across their common axis.
From Darwin, and After Darwin (Vol. 1 and 3, of 3) An Exposition of the Darwinian Theory and a Discussion of Post-Darwinian Questions by George John Romanes
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