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Chromomere


Chromomere
The term applied by Wilson (1896) to each of the serially aligned granules of a chromosome, best seen when the thread is relatively elongated as in early prophase 1 ofmeiosis(Gk. chroma, colour; meros, part).
Related Terms: Chromosome ...
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Chromomere One of the serially aligned beads or granules of a eukaryotic chromosome, resulting from local coiling of a continuous DNA thread.
Chromosomal deletion The loss of part of a chromosome's DNA.
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chromomere One of the chromatin granules of characteristic size on the chromosome; may be identical with a gene or a cluster of genes.
chromonema A convoluted thread in prophase of mitosis or the central thread in a chromosome.
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The chromosome strands (20 nm diameter fibers consisting of two double strands of DNA) are dotted with about 5000 chromomeres (dark staining irregular structures also seen in interphase chromosomes).
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In this phase, chromosomes shorten and become visible as single threadlike structures. Beaded appearances, if any, are due to the alternation of densely stained chromomeres in comparison with non-staining areas.
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Chromosomes of amphibian oocytes having loops suggestive of a lampbrush. Large chromosomes found in amphibian eggs, with lateral DNA loops, extending from chromomeres, producing a brushlike appearance under the microscope.
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