pronucleus
Americannoun
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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
Part of it is extruded, and part dissolved in the cell contents; only a very small part of it is left to form the basis of a fresh nucleus, the pronucleus femininus.
From The Evolution of Man — Volume 1 by Ernst Heinrich Philipp August Haeckel
If this is true, the centrosome of the zygote nucleus must be entirely derived from that of the male pronucleus.
From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various
The male pronucleus has the remains of the body of the spermatozoön adhering to it.
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
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 H. W. (Herbert William) Conn
PN, pronuclei; PNF, pronuclear fading. b, Representative human embryo at each developmental stage analysed.
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
In Echinus, for instance, the two pronuclei fuse, and the spindle and chromosomes are formed from the zygote nucleus, whereas in the mouse the two pronuclei retain their distinctness during the formation of the chromosomes.
From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various
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.
