Tetrad

tetrad
the four homologous chromatids in a bundle during the prophase and metaphase of meiosis
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
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The use of tetrads (definition 2) to study the segregation of chromosomes and genes during meiosis.
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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Tetrad
The four haploid cells formed at the end of meiosis. The term was formerly used for the four chromatids making up a chromosome-pair at the first division of meiosis.
Related Terms: Haploid ...
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Tetrad analysis
A method for establishing linkage relationships in fungi by analysing the four products from individual meiotic divisions.
Tetrad
The four products of a single meiosis.
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tetrad
[Gk. tetras, four]
In genetics, a pair of homologous chromosomes that have replicated and come together in prophase I of meiosis; consists of four chromatids.
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tetrad The four chromatids in each cluster during synapsis; formed by the two sister chromatids in each of the two homologous chromosomes. PICTURE ...
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tetrad A pair of homologous chromosomes during synapsis (prophase I of meiosis). A tetrad consists of four chromatids.
tetrapods A nontaxonomic designation used to refer to amphibians, reptiles, birds, and mammals.
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tetrad
the four homologous chromatids that associate during prophase and metaphase of meiosis and are involved in crossing over. A tetrad is also the four haploid cells produced by one complete meiotic division.
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Bivalents (tetrads) become aligned in the center of the cell and are attached to spindle fibers.
The chromosome alignment illustrated below is from a cell with a diploid chromosome number of 8.
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[More] Tetracycline antibiotics Tetracycline response element Tetrad(1) The duplicated homologous chromosomes held together by chiasmata prior to anaphase of meiosis I. Each tetrad contains four chromatids.
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We are developing technology to monitor changes protein expression in single tetrads of D. radiodurans following exposure to ionizing radiation.
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However, the alignment of chromosomes for prophase is different. Homologous chromosomes join into tetrads (so called because each tetrad contains four chromatids), and the tetrads line up on the metaphase plane .
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metaphase I: the phase during meiosis in which tetrads align on the equatorial plate (as in mitosis).
metaphase II: the phase during meiosis II in which the chromatid pairs gather at the center of the cell prior to separation.
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Bivalent a pair of homologous chromosomes during meiosis also known as a tetrad
(bi = two; valent = strength)
Blastocyst the hollow ball stage of embryonic development
(blasto = bud sprout) ...
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They may also be referred to as a tetrad, a reference to the four sister chromatids. During this stage, one percent of DNA that wasn't replicated during S phase is replicated. The significance of this cleanup act is unclear.
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AP-1 is actually a complex between c-fos protein and c-jun protein, or sometimes is just c-jun dimers. The AP-1 site consensus sequence is (C/G) TGACT(C/A) A. Also known as the TPA-response element (TRE). (TPA is a phorbol ester, tetradecanoyl ...
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