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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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]
Farlex Partner Medical Dictionary © Farlex 2012

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005