| Zygote | ||
|---|---|---|
| Days | 1 | |
| Dorlands/Elsevier | z_01/12871436 | |
- For other meanings see Zygote (disambiguation). Elsevier, the world's largest Publisher of Medical and Scientific literature, forms part of the Reed Elsevier group
A zygote (from Greek zugōtos ‘joined’, from zugoun ‘to join’) is a cell that is the result of fertilization. The cell is the structural and functional unit of all known living Organisms It is the smallest unit of an organism that is classified as living and is often called For soil improvement see Fertilization (soil. 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). "Haplo" redirects here For the fictional character see The Death Gate Cycle. An ovum (plural ova) is a Haploid Female reproductive cell or Gamete. Female (♀ is the Sex of an Organism, or a part of an organism which produces ova (egg cells The term sperm is derived from the Greek word (σπέρμα sperma (meaning "seed" and refers to the male reproductive cells. Male (♂ refers to the sex of an organism or part of an organism which produces small mobile Gametes called spermatozoa. "Haplo" redirects here For the fictional character see The Death Gate Cycle.
In mammals, fusion of the sperm with the ovacyte occurs in the Fallopian tube and the resulting diploid zygote becomes embedded in the uterus wall.
Animal zygotes undergo mitotic cell divisions to become an embryo. Mitosis is the process in which a Eukaryotic cell separates the Chromosomes in its Cell nucleus, into two identical sets in two daughter nuclei Cell division is a process by which a cell, called the parent cell divides into two or more cells called daughter cells. An embryo (from Greek:, plural, lit "that which grows" from en- "in" + bryein "to swell be full" is a multicellular Other organisms may undergo meiotic cell division at this time (for more information refer to biological life cycles). In Biology or life science meiosis (pronounced my-oh-sis is a process of reductional division in which the number of chromosomes per cell is cut in half A life cycle is a period involving 1 Generation of an Organism through means of Reproduction, whether through Asexual reproduction or Sexual
Twins
Twins and multiple births can be monozygotic (identical) or dizygotic (fraternal), meaning they arise from one or several (strictly, two) fertilization events. Twins are Offspring resulting from the same Pregnancy, either of the same or opposite Sex. A multiple birth occurs when more than one Fetus is carried to term in a single Pregnancy.
However, polyspermic zygotes in mice have been manipulated so as to remove one of the two male pronuclei and made to survive birth.
In other species
A biparental zygote is a Chlamydomonas zygote that contains chloroplast DNA (cpDNA) from both parents. Chlamydomonas is a genus of Green alga. They are unicellular Flagellates Chlamydomonas is used as a Model organism for Molecular Chloroplasts are Organelles found in Plant cells and eukaryotic Algae that conduct Photosynthesis. Deoxyribonucleic acid ( DNA) is a Nucleic acid that contains the genetic instructions used in the development and functioning of all known Chloroplasts are Organelles found in Plant cells and eukaryotic Algae that conduct Photosynthesis. Haploid + Haploid = Diploid
See also
| Preceded by oocyte Sperm |
Stages of human development Zygote |
Succeeded by Embryo |
Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic