Sister chromatids are identical copies of a chromosome. Compare sister chromatids to homologous chromosomes, which are the two different copies of the same chromosome that diploid organisms (like humans) inherit, one from each parent.
sister chromatids - two identical copies of a parent chromosome which are attached to one another at the centromere.
somatic cell - any cell in the body that is not a germ cell (reproductive cell).
sister chromatids Chromatids joined by a common centromere and carrying identical genetic information (unless crossing-over has occurred). PICTURE ...
Sister chromatid exchange A crossover between sister chromatids (chromatids which are the products of replication of a single chromosome and which ought therefore to be genetically identical).
Sister chromatids that stain differently, so that one appears dark and the other light (harlequin-like).
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
sister chromatid One of the two identical parts of a duplicated chromosome in a eukaryotic cell. Sister chromatids consist of exact copies of a long coiled DNA molecule with associated proteins.
Compare: sister chromatids.
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allows the sister chromatids at the metaphase plate to separate and move to the poles (= anaphase), completing mitosis;
destroys cyclin B.
At synapsis, non-sister chromatids of homologous pairs cross over at chiasmata
Homologous chromatids (corresponding pieces of genetic material) break and exchange equivalent segments between maternal and paternal chromatids ...
Anaphase is characterized by two distinct processes to separate the sister chromatids and move them to opposite spindle poles in preparation for cell division.
Anaphase is preceded by metaphase, by the end of which fully condensed sister chromatids are arranged in pairs, their centromeres lying along a surface known as the metaphase plate.
Centromere: Constricted region where sister chromatids are attached in mitotic chromosomes. The centromere is generally flanked by repetitive DNA sequences and it is late to replicate. The centromere is an A-T region of about 130 bp.
A cross-over between strands of two non-sister chromatids during recombination. The junction where two homologous chromosomes appear to exchange genetic material during recombination. (Chi is the greek letter c which resembles a genetic cross-over.) ...
Anaphase I: Chiasmata break apart and sister chromatids begin migrating toward opposite poles.
Telophase I: CLEAVAGE FURROW forms beginning the process of CYTOKINESIS (cell division). Resulting daughter cells are HAPLOID (1N).
Centromere the central region of a chromosome which holds the sister chromatids together
(centro = center; mer = part)
Cerebellum the wrinkled-looking‚ posterior part of the brain
(cereb = the brain; -elle = small) ...
the appearance of chromosomes after a type of staining procedure using bromodeoxyuridine; this procedure is useful for detecting sister chromatid exchanges, because the sister chromatids stain differently ...
centromere A specialized region on each chromatid to which kinetochores and sister chromatids attach. PICTURE
cephalization The concentration of sensory tissues in the anterior part of the body (head).
(kih-net-oh-kor) [Gk. kinetikos, putting in motion + choros, chorus]
A specialized region on the centromere that links each sister chromatid to the mitotic spindle.
kingdom
A taxonomic category, the second broadest after domain.
a wide spectrum of topics, including a comprehensive introduction; an anatomy of the genome; the molecular biology of heterochromatin, kinetochores, and centromeres; meiotic chromosomes; dosage compensation and sex determination; sister chromatid ...
During cell division, the chromosomes first replicate so that each daughter cell receives a complete set of chromosomes. Following DNA replication, the chromosome consists of two identical structures called sister chromatids, ...
 See also: Chromatid, Chromosome, Sister Chromatids, Chromosomes, Cell
  
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