Zygote

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Zygote
Days 1
For other meanings see Zygote (disambiguation).

A zygote (from Greek ζυγωτός zugōtos "joined" or "yoked", from ζυγοῦν zugoun "to join" or "to yoke")[1] is a cell that is the result of fertilization. That is, two haploid cells—usually an ovum from a female and a sperm cell from a male—merge into a single diploid cell called the zygote (or zygocyte).

Contents

Twins

Twins and multiple births can be monozygotic (identical) or dizygotic (fraternal), meaning they arise from one or several (strictly, two) fertilization events. Polyspermic zygotes in mice have been manipulated so as to remove one of the two male pronuclei and made to survive birth.[2]

In other species

A biparental zygote is a Chlamydomonas (a kind of algae) zygote that contains chloroplast DNA (cpDNA) from both parents.

References

  1. ^ "English etymology of zygote". myetymology.com.
  2. ^ "Birth of normal mice after removal of the supernumerary male pronucleus from polyspermic zygotes". National Center for Biotechnology Information.

See also

Preceded by
Oocyte
Sperm		 Stages of human development
Zygote		 Succeeded by
Embryo
Developmental biology > Human embryogenesis (development of embryo) and development of fetus (some dates are approximate - see Carnegie stages and a timeline)
Week 1
Week 2
Week 3 (Trilaminar embryo,
germ layers)
Extraembryonic/uterus
Histogenesis
Organogenesis
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More about Zygote: zygote development, zygote embryo fetus, zygote fungi, damien zygote, define zygote, zygote chronicle, zygote formation, picture of zygote,

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