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Zygote in Medical News

Female Twins Have More To Share Than Just The Similarity: Risk Of Early Menopause

... is believed that premature menopause in identical twins might be to do with the embryo splitting process. Monozygotic twins are derived form a single zygote that divides into two separate entities within the first 2 weeks of development. About 1% of women in general have gone through the menopause by ...
Zygote in Medical Dictionary

Zygote

... A zygote is the combined cell resulting from the union of sperm and egg. A zygote develops into an embryo. An embryo, a mass of ... begins formation of a human body. Homo zygote /HomozygotesAre individuals who have both genes ...

Autosomal dominant

... of MedicineNet For: search help Printer-Friendly Format ... Autosomal dominant inheritance refers to disorders that are expressed in the hetero zygote , i.e., the affected person has one copy of a mutated allele and one allele that is functioning normally. Autosomal Dominant PKD What is ...

Mutation

... Mutation , germline: A heritable change in the DNA that occurred in a germ cell (a cell destined to become an egg or in the sperm ) or the zygote (the conceptus) at the single- cell stage. Mutation s in BRCA1 and BRCA2 Nearly 2,000 distinct mutation s and sequence variations in BRCA1 ...

Pregnancy

... and no known risk with ultrasound im aging . How do I prepare for this procedure? Tubal pregnancy Pregnancy in one of the fallopian tube s. zygote The fertilized egg. For Your Information ... A normal pregnancy can still involve some undesirable symptoms like nausea and back pain . This ...

Tubal pregnancy

... the ectopic pregnancy , internal bleeding or hemorrhage may lead to shock . Tubal pregnancy Pregnancy in one of the fallopian tube s. zygote The fertilized egg. For Your Information ... An ectopic (ek-TOP-ik) pregnancy , also called a tubal pregnancy , is a pregnancy that grows ...

Viral

... infection of certain sensory nerve s that causes pain and an eruption of blister s on the skin along the course of the infected nerve . zygote A fertilized ovum (egg). Anti viral medication used to treat human flu virus es may be effective at treating bird flu . Hepatitis , ...

Zoster

... infection of certain sensory nerve s that causes pain and an eruption of blister s on the skin along the course of the infected nerve . zygote ... Herpes zoster : Herpes zoster , also known as shingles , is a reactivation of chickenpox . With shingles , a rash occurs, usually ...

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Zygote in Biological News

New research finds possible genetic link to cause of pregnancy loss and disorders

... bad copy, there were fewer births. Further research revealed this is because aneuploidy was generated in the egg and passed on to the single-cell zygote that forms when a sperm fertilizes an egg. And this led to the loss of the embryo. "This work certainly points to Bub1 having a role in maternal ...

New egg freezing technique offers hope to hundreds of women

... director of the Unita di Medicina Della Riproduzione, Fondazione HERA, Catania, Italy, told the conference that Italy had banned embryo and zygote freezing in 2004, and any embryos created for IVF, up to a maximum of three, had to be implanted in one transfer. As a consequence of this new law, ...

Scientists unpick genetics of first 15 minutes of life

... in sexually reproducing animals. The absence or mutation of this gene in the maternal (mother's) genome explains why eggs fail to produce a zygote - or early embryo - despite the presence of 'healthy' sperm. Although the researchers use the fruit fly Drosophila melanogaster to discover the ...
Zygote in Biological Definition

Gamete

... involving a sperm and an egg), they form a zygote —a cell having two complete sets of chromosomes and therefore diploid . The zygote cell receives one set of chromosomes from each of ... cell divisions and cellular differentiation , a zygote develops , first into an embryo , and ...

Twin

... when a single egg is fertilized to form one zygote ( monozygotic ) but the zygote then divides into two separate embryos . The ... same womb. Depending on the stage at which the zygote divides, identical twins may share the same ...

Zygote

... A zygote ( Greek : ... into a single diploid cell called the zygote . Animal zygotes undergo mitotic cell ... (fraternal). See also Pregnancy zygote intrafallopian transfer Embryogenesis ...

Developmental biology

... the study of organisms between the one-cell stage (generally, the zygote ) and the end of the embryonic stage, which is not necessarily the ... pangenesis , phylogeny , primordium , pupa , rudiment , teratology , zygote Developmental model organisms Often used model organisms in ...

Sperm

... called semen , and is capable of fertilising an egg cell to form a zygote . A zygote can grow into a new organism, such as a human. Sperm cells contain half ...

Bacterial conjugation

... of sexual reproduction or mating ; however it is not actually sexual as it does not involve the fusing of gametes and the creation of a zygote , it is merely the exchange of genetic information. In order to perform conjugation, one of the bacteria has to carry an F- plasmid , the other one ...

Cell growth

... special daughter cells ( gametes ) which have half the normal cellular amount of DNA. A male and a female gamete can then combine to produce a zygote , a cell which again has the normal amount of chromosomes. For details see the individual articles on DNA replication , binary fission , mitosis ...

Ploidy

... over the other. This is called alternation of generations . Most diploid organisms produce haploid sex cells that can combine to form a diploid zygote , for example animals are primarily diploid but produce haploid gametes . During meiosis , germ cell precursors have their number of chromosomes ...

Embryo

... seed — it is called a seedling . Animals : The embryo of vertebrates is defined as the stages between the first division of the zygote (a fertilized ovum ) until it becomes a foetus . An embryo is called a foetus at a more advanced stage of development and up until birth or ...

Genetic recombination

... is fairly rare compared to normal recombination, but severe problems can arise if a gamete containing unbalanced recombinants becomes part of a zygote . Offspring with severe unbalances rarely live through birth. Other types of recombination Conservative site-specific recombination In ...

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Zygote in Biological Dictionary

Zygote

... A zygote (or zygocyte) is a term in Developmental ... ... 3D computer modeling company. zygote ( ) n. The cell formed by the union of two ... before cleavage ... results in the diploid zygote , with a full set of ... ...

Diploid nuclei

... ... ... algae, the diploid nucleus (or zygote nucleus ) may move ... The carposporophyte develops from the zygote nucleus following fertilization. It is thus ... nuclei , and meiosis. ... In many fungi, the zygote nuclei are the only diploid nuclei of the ...

Blastocoel

... region of a blastocyst. A blastocoele forms during embryogenesis when a zygote divides into many cells through mitosis. Aspects of the topic ... a sperm fertilizes an egg cell, the result is a cell called the zygote that ... the blastocoel , surrounded by ... ...

Umbilical cord

... the connecting cord from the developing embryo or fetus to the placenta. During prenatal development, the umbilical cord comes from the same zygote as the fetus and (in ... Umbilical cord prolapse is an obstetric emergency during pregnancy or labor that imminently endangers the ...

Syngamy

... – Our zoology dictionary has ecology, physiology, genetics of syngamy , ... syngamy The union of nuclei of two gametes to produce a zygote nucleus, ... Pronunciation of syngamy . syngamy synonyms. syngamy usage examples and syngamy quotes. ... syngamy definition. syn·gamy ...

Sperm cells

... (living being) and more commonly known as a sperm cell, is the haploid cell that is the male gamete. It joins an ovum to form a zygote. A zygote is a single cell, with a complete set of chromosomes, ... Because sperm cells are haploid, they contribute half of the genetic ...

Ootid

... . ootid synonyms. ootid usage examples and ootid quotes. ootid mature ovum after penetration by sperm but before the formation of a zygote ... number of the ootid and spermatid? How does ootid differ from a polar ... ootid ( ) n. A haploid cell that results from the meiotic ...

Morula

... Information about morula in the free online English dictionary and encyclopedia. ... morula - a solid mass of blastomeres that forms when the zygote splits; develops ... Morula - Definition of Morula at Dictionary.com a free online dictionary with ... morula ... A morula is usually ...

Micronucleus

... as the paramecium. In fission it divides by mitosis, and in conjugation furnishes the pairing of gamete nuclei, by whose reciprocal fusion a zygote nucleus is formed, which gives rise to the macronuclei and micronuclei of the individuals of the next cycle of fission. Thermo Scientific ...

Haploid Cell

... than 50% near- haploid , cells with a ... ... proliferation and differentiation of a single haploid cell called the "gamete. ... The zygote undergoes meiosis immediately, creating four haploid cells . ... Haploid - Definition of Haploid at Dictionary.com a free online ...

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