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GLOSSARY OF BIOTECHNOLOGY

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- J -

J  1. Joining segment, q.v.

    2. Joule, q.v.

Jiffy potTM  Pots made from wood pulp and peat, commonly used for transplanting tissue-culture-derived plants into soil medium.

JIVET  See juvenile in vitro embryo technology.

JIVT  See juvenile in vitro embryo technology.

J/m2; J m-2 (joules per square metre)  A unit of light measurement.

joining segment (J)  A small DNA segment that links genes in order to yield a functional gene encoding an immunoglobulin.

joule (SI symbol: J)  The amount of energy needed to apply a force of 1 newton over a distance of 1 metre.

jumping genes  See transposable elements.

jumping library  See chromosome jumping.

juvenility  Early phase of development in which an organism is juvenile and incapable of sexual reproduction.

juvenile hormone  A hormone secreted by insects from a pair of endocrine glands close to the brain. It inhibits metamorphosis and maintains the larval features.

juvenile in vitro embryo technology (JIVT; JIVET)  A technology involving collection of immature ova from young animals, in vitro maturation of those ova, in vitro fertilization, and then transfer of the resultant embryos into recipient females. A method of achieving rapid generation turnover.

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Cited in http://www.fao.org/DOCREP/003/X3910E/X3910E00.htm