population sélective

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• Selective recruitment — is a term introduced to explain an observed effect in traffic safety. When safety belt laws are passed, belt wearing rates increase, but casualties decline by smaller percentages than estimated in a simple calculation. This is because those… …   Wikipedia

• Population bottleneck — followed by recovery or extinction A population bottleneck (or genetic bottleneck) is an evolutionary event in which a significant percentage of a population or species is killed or otherwise prevented from reproducing.[1] A slightly different… …   Wikipedia

• Selective sweep — A selective sweep is the reduction or elimination of variation among the nucleotides in neighbouring DNA of a mutation as the result of recent and strong natural selection. A selective sweep can occur when a new mutation occurs in a gene that… …   Wikipedia

• Selective Service Act of 1917 — The Selective Service Act or Selective Draft Act (P.L. 65 12, 40 Stat. 76) was passed by the Congress of the United States on May 18, 1917. It was drafted by Brigadier General Hugh Johnson after the United States entered The Great War. It… …   Wikipedia

• Selective immunoglobulin A deficiency — Infobox Disease Name = PAGENAME Caption = The dimeric IgA molecule. 1 H chain, 2 L chain, 3 J chain, 4 secretory component DiseasesDB = 29569 ICD10 = ICD10|D|80|2|d|80 ICD9 = ICD9|279.01 ICDO = OMIM = 137100 MedlinePlus = 001476 eMedicineSubj =… …   Wikipedia

• Population — In biology a population is the collection of inter breeding organisms of a particular species; in sociology, a collection of human beings. A population shares a particular characteristic of interest, most often that of living in a given… …   Wikipedia

• Population pyramid — This distribution is named for the frequently pyramidal shape of its graph. A population pyramid, also called an age structure diagram, is a graphical illustration that shows the distribution of various age groups in a population (typically that… …   Wikipedia

• selective advantage — noun The characteristic of an organism that enables it to survive and reproduce better than other organisms in a population in a given environment; the basis for evolution by natural selection …   Wiktionary

• selective radiography — radiography of certain segments of the population, chosen on some specific basis such as symptoms …   Medical dictionary

• Sex-selective abortion and infanticide — Sex selective abortion is the targeted abortion of a fetus based upon its sex. This is done after a determination is made (usually by ultrasound but also rarely by amniocentesis or another procedure) that the fetus is of an undesired sex. Sex… …   Wikipedia

• Sex-selective abortion — is the practice of terminating a pregnancy based upon the predicted sex of the baby. The selective abortion of female fetuses is most common in areas where cultural norms value male children over female children,[1] especially in parts of People… …   Wikipedia