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Vitro in Biological Definition

Infertility

... the woman being artificially inseminated with donor sperm. In vitro fertilization (IVF) in which eggs are removed from the woman, fertilized ... and infertility treatment. The status of embryos fertilized in vitro and not transfered in vivo . IVF and other fertility treatments have ...

Stem cell

... potential to form derivatives of all three embryonic germ layers both in vitro and in teratomas. These properties were also successfully maintained (for ... issues, as the blastocysts involved in the research are left over from in vitro fertility therapy , and when not used in additional therapy or in ...

Artificial life

... systems. Microelectronic technology and genetic engineering will soon give us the capability to create new life forms in silico as well as in vitro , This capacity will present humanity with the most far-reaching technical,theoretical and ethical challenges it has ever confronted. The time ...

Biology

... NASA Ames Research Center - Bachelor of Science - Publications Terms and phrases Omne vivum ex ovo - In vivo - In vitro - In utero - In silico Related disciplines Medicine ( Physician ) - Physical anthropology Outstanding problems Origin ...

Capacitation

... and look mature prior to capacitation. In vivo this final step typically occurs after ejaculation , in the female reproductive tract . In vitro , capacitation can occur in sperm that have either undergone ejaculation or have been extracted from the epididymis . Non-mammalian spermatozoa do ...

Chromosome

... : Karyogram of human female Karyotype To determine the (diploid) number of chromosomes of an organism, cells can be locked in metaphase in vitro (in a reaction vial) with colchicine . These cells are then stained (the name chromosome was given because of their ability to be stained), ...

DNA

... identical to the previous strand. Errors that occur in the synthesis are known as mutations . The process known as PCR mimics this process in vitro in a nonliving system. Because pairing causes the nucleotide bases to face the helical axis, the sugar and phosphate groups of the nucleotides run ...

Embryo

... is from the eighth week of gestation . Stages : morula -> blastula -> gastrula . See also Embryogenesis Embryology In vitro fertilization Plant embryogenesis Embryo space colonization A chick embryo of thirty-three hours' incubation External ...

HeLa

... because few researchers test the identity or purity of already-established cell lines. It has been claimed that a substantial fraction of in vitro cell lines are actually HeLa, their original cells having been overwhelmed by a rapidly growing population derived from HeLa contaminant cells. It ...

Human

... of the individual begins at conception . An egg is usually fertilized inside the female by the male through sexual intercourse , though in vitro fertilization methods are also used. The developing individual is first called a zygote ; as it grows through successive stages inside the ...

Immunology

... , immune deficiency , allograft rejection); the physical, chemical and physiological characteristics of the components of the immune system in vitro , in situ , and in vivo . Immunology has various applications in several disciplines of science, and as such is further divided. Contents ...

Long-term potentiation

... the strengthening (or potentiation ) of the connection between two nerve cells which lasts for an extended period of time (minutes to hours in vitro and hours to days and months in vivo ). LTP can be induced experimentally by applying a sequence of short, high-frequency stimulations to nerve ...

Microbiology

... branches of biology: Bacteria and simple eukaryotes contain small circular DNAs , called plasmids . Plasmids can be genetically modified in vitro then inserted into bacteria that are grown in a culture to produce large amounts of protein using genes encoded on a plasmid. The proteins ...

Polymerase chain reaction

... divide. It works by binding to a single DNA strand and creating the complementary strand. In Mullis's original PCR process, the enzyme was used in vitro (in a controlled environment outside an organism). The double-stranded DNA was separated into two single strands by heating it to 96C. At this ...

Twin

... from 10 to 20 percent. This is primarily down to the passing of multiple embryos into the uterus in order to increase the success rate of in vitro fertilisation (IVF). Twin studies Twin studies refers to the practice of assessing identical twins for medical, genetic, or psychological ...
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