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Centromere


centromere
a region of a chromosome where it attaches to a spindle fiber during mitosis and meiosis
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
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Centromere
The point where the two identical chromatids are connected during mitosis/meiosis.
Related ...
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Centromere
[Gr. kentron - point, spine, center of a circle; Gr. meros - a part]. The region of a chromosome where two chromatids are joined and where spindle fibers attach during mitosis and meiosis.
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A centromere is the region where sister chromatids join in the double chromosomal structure during mitosis, prophase and metaphase.
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Definition of centromere :
A kinetochore; the constricted region of a nuclear chromosome, to which the spindle fibres attach during division. ...
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Centromere
The centromere is a region of a eukaryotic chromosome where the kinetochore is assembled. Thus, it is the site where spindle fibers of the mitotic spindle attach to the chromosome during mitosis.
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Dr. Danilo Tagle, of the National Human Genome Research Institute's Genetics and Molecular Biology Branch, defines centromere.
illustrated:
View illustration ...
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Centromeres are important for chromosome segregation.
Facts
Historically, finding chromosome condensation prior to fertilization was followed rapidly by the observation that the same transformation occurs prior to cell division (left).
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Centromere
The term introduced by Darlington (1936) for the specialized chromosome region which reacts to the spindle at nuclear division and to which spindle fibers attach during cell division. Appears as a distinct "waist" by microscopy.
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Centromere
The region of a eukaryotic chromosome responsible for attachment to the mitotic or meiotic spindle leading to controlled partitioning of chromosomes during nuclear division.
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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).
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centromeres and
telomeres
is densely-packed;
is greatly enriched with transposons and other "junk" DNA;
is replicated late in S phase of the cell cycle;
has reduced crossing over in meiosis.
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centromere: the place of attachment of the two homologous chromatids during prophase in mitosis.
cerebrum: the portion of the forebrain that controls higher mental activity, such as learning, memory, logic, creativity, and emotion.
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Centromere. The central portion of the chromosome to which the spindle fibers attach during mitotic and meiotic division.
Chemotherapy. A treatment for cancers that involves ad- ministering chemicals toxic to malignant cells.
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Centromere A specialized chromosome region to which spindle fibers attach during cell division.
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centromere - see kinetochore.
centrosome - microtubule organizing center that contains the centriole; it divides and organizes the poles of the mitotic spindle apparatus during mitosis.
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centromere
(sen-tro-mere) [Gk. kentron, center + meros, a part]
The centralized region joining two sister chromatids.
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centromere Constricted region of a mitotic chromosome that holds sister chromatids together; also the site on the DNA where the kinetochore forms and then captures microtubules from the mitotic spindle.
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centromere
The centralized region joining two sister chromatids.
Covered in Lab 5 Sexual Lifecycles and Meiosis
cephalic
Pertaining to the head.
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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.
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Centromere: A specialized constricted region of a chromosome to which spindle fibers attach during cell division at which two sister chromatids (the two exact copies of each chromosome that are formed after replication) are joined, ...
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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) ...
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A chromosome whose centromere lies between its middle and its end but closer to the middle.
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 ...
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(See Density gradient centrifugation.) Centromere. The central portion of the chromosome to which the spindle fibers attach during mitotic and meiotic division. Chemotherapy.
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Centromere -- a region of a chromosome to which spindle traction fibers attach during mitosis and meiosis; the position of the centromere determines whether the chromosome is considered an acrocentric, metacentric or telomeric chromosome.
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centromere A specialized region of a chromosome which serves as the attachment point for the mitotic or meiotic spindle. cerebroside Sphingolipid containing one sugar residue as a head group, e.g. glucosylceramide.
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- Chromosome
- Daughter Cell
- Centromere
Definition: Two identical copies of a single chromosome that are connected by a centromere.
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The diagram below is a portion of a double-stranded chromosome showing the centromere and a portion of the base sequence. The diagram does not show the extensive looping and coiling and the proteins associated with coiling.
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Genomic DNA in fragments of 200-500 kb are linked to sequences which allow them to propagate in yeast as a mini-chromosome (including telomeres, a centromere and an ARS - an autonomous replication sequence).
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