segregation


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segregation

 [seg″rĕ-ga´shun]
the separation of allelic genes during meiosis as homologous chromosomes begin to migrate toward opposite poles of the cell, so that eventually the members of each pair of allelic genes go to separate gametes.

seg·re·ga·tion

(seg'rĕ-gā'shŭn),
1. Removal of certain parts from a mass, for example, those with infectious diseases.
2. Separation of contrasting characters in the offspring of heterozygotes.
3. Separation of the paired state of genes, which occurs at the reduction division of meiosis; only one member of each somatic gene pair is normally included in each sperm or oocyte; for example, an individual heterozygous for a gene pair, Aa, will form gametes half containing gene A and half containing gene a.
4. Progressive restriction of potencies in the zygote to the following embryo.
[L. segrego, pp. -atus, to set apart from the flock, separate]

segregation

(sĕg′rĭ-gā′shən)
n.
1. The act or process of segregating or the condition of being segregated.
2. Genetics The separation of paired alleles or homologous chromosomes, especially during meiosis, so that the members of each pair appear in different gametes.

seg·re·ga·tion

(seg'rĕ-gā'shŭn)
1. Removal of certain parts from a mass (e.g., those with infectious diseases).
2. Separation of contrasting characters in the offspring of heterozygotes.
3. Separation of the paired state of genes, which occurs at the reduction division of meiosis; only one member of each somatic gene pair is normally included in each sperm or ovum.
4. Progressive restriction of potencies in the zygote to the following embryo.
[L. segrego, pp. -atus, to set apart from the flock, separate]

segregation

  1. the separation of HOMOLOGOUS CHROMOSOMES during anaphase 1 of MEIOSIS, to produce gametes containing only one allele of each gene. Such an occurrence is the physical mechanism underlying the first law of MENDELIAN GENETICS and is particularly important when the two separated alleles are different.
  2. an ability of bacterial REPLICONS to be partitioned accurately and evenly between daughter cells during CELL DIVISION. See par LOCUS.
References in periodicals archive ?
Viterra is advising the malting barley segregations, in each region, for the 2015/16 season.
Bonsu, took some journalists round Kwamo in the Ejisu Municipality, where the project is being piloted, and explained that Ghana would require about 5 million sets of waste segregation bins, or 20 million separate waste bins at the cost of GHS5 billion and GHS700 million respectively, to implement waste segregation nationwide.
McGuire Sponsel offers cost segregation, R and D tax credits, cost segregation, IC-DISC, and Credits and Incentives.
Thus, the Alamosa school board defended itself using an argument (these students were White, so they couldn't be racially segregated) that nobody ever thought to use to justify the segregation of Black students.
Acting Medical Director Prof Dr Mukhtiar Zaman said that this training was key for hospital employees to learn about the process of waste management and segregation.
the hospital employees to know the process of waste management and segregation. He encouraged the employees for putting in their effort for bringing the institution up to international guidelines.
The study analyzed Census Bureau data since 1990 and examined micro, macro, and total racial segregation across 222 metropolitan areas.
and PowderEx inventor, says, "PowderEx is the simplest, most practical, economical and operator-friendly accelerated powder segregation tester developed from twelve years of research and five prototypes."
The findings complicate traditional explanations for increasing segregation as being due to blacks clustering in small areas abutting white communities, the use of restrictive covenants on residential housing, the presence of large manufacturing firms which employed blacks, and differences in transportation infrastructure, since these were all urban phenomena.
A cost segregation study is the process of identifying the component parts of real property and depreciating components identified as either personal property or land improvements over a shorter depreciation period for federal tax purposes.
Growing economic segregation across cities, though, is also shaped by a parallel, even stronger force: concentrated wealth.
Fairness requires that prisoners should be provided with sufficient information about the reasons and evidence relied on to justify the initial decision to segregate them, and their continuing segregation, so as to enable them to make meaningful and effective representations in their defence.