pronucleus
Americannoun
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
FIG.40.—Completion of the process of extrusion of the chromatic material; fn shows the two chromosomes retained in the egg forming the female pronucleus.
From The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity by Conn, H. W. (Herbert William)
Now the centrosome, which is beside the male pronucleus, shows signs of activity.
From The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity by Conn, H. W. (Herbert William)
This is undoubtedly derived from the spermatozoon, possibly from its nucleus only, and is called the male pronucleus.
From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various
Giard suggests that in some cases of apparently normal fertilization one of the pronuclei may degenerate, the resultant embryo being the product of one pronucleus only.
From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various
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 two haploid nuclei derived from the sperm and oocyte and contained within the egg are referred to as pronuclei.
From Textbooks ● Jun. 19, 2013
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
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 chromatin in both pronuclei now forms into a skein.
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 Romanes, George John
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
