B chromosome
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B Chromosome. B chromosomes were recently identified in a laboratory stock of Drosophila melanogaster an established model organism with a wealth of genetic and genomic resourcesenabling us to subject them to extensive molecular analysis. The maize B chromosome is a non-essential chromosome with an accumulation mechanism. McGraw-Hill Concise Dictionary of Modern Medicine. Supernumerary B chromosomes are dispensable elements found in many eukaryote genomes in addition to standard A chromosomes.
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They are most often found in plants and invertebrat. B chromosomes do not contain any structural genes and have a highly variable pattern of inheritance separate from that of the normal chromosomal complement. Maize lines with B chromosomes have been widely used in studies of centromere functions. 2002 by The McGraw-Hill Companies Inc. Previous studies suggested that B chromosomes are evolved from standard chromosomes. Increases asymmetry chiasma distribution.
The importance of B chromosomes is illustrated by the series of conferences on B chromosomes that have been organized during the last three decades.
The maize B chromosome is a non-essential chromosome with an accumulation mechanism. The B chromosomes also have the following effects on A chromosomes. Because of its smaller size and its similarity in composition the initial B chromosome may have been a fragment that broke away from chromosome 4. Some species however can also carry supernumerary chromosomes referred to as B chromosomes. In addition to normal chromosomes the karyotype many species have B chromosomes. Only one of these fragments however would.
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McGraw-Hill Concise Dictionary of Modern Medicine. They are also called as Accessory Chromosomes and lack homologous. Our data suggested that maize B chromosome influences the A-genome transcription with stronger effect associated with an increase in copy number of B chromosome. 2002 by The McGraw-Hill Companies Inc. A small usually heterochromatic chromosome present in addition to the normal complement of chromosomes in some members of a species Note.
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B-chromosomes occur widely in flowering plants are devoid of functional genes and display an irregular non-Mendelian mode of inheritance. A small usually heterochromatic chromosome present in addition to the normal complement of chromosomes in some members of a species Note. The B chromosomes suppress homologous pairing which reduces multiple pairing between homologous chromosomes in allopolyploids. Source for information on B-chromosome. Wild populations of many.
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Maize lines with B chromosomes have been widely used in studies of centromere functions. Thousands of eukaryotic species harbor dispensable B chromosomes which perpetuate in natural populations as genomic parasites 1 2Recent research has shown that B chromosomes usually carry redundant genetic information already present on the standard A chromosomes 3456The most remarkable exception is the paternal sex ratio PSR B chromosome in the wasp Nasonia. The B chromosomes suppress homologous pairing which reduces multiple pairing between homologous chromosomes in allopolyploids. The dispensable nature of the B chromosome facilitates many types of genetic studies in maize. 2002 by The McGraw-Hill Companies Inc.
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The maize B chromosome is a non-essential chromosome with an accumulation mechanism. In many respects B chromosomes resemble sex chromosomes so that a common ancestry for them has frequently been suggested. That is there may be some individuals lacking them in the population The number of B chromosomes may vary between cells tissues and individuals within a population which is due to. Only one of these fragments however would. The maize B chromosome is a non-essential chromosome with an accumulation mechanism.
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B chromosomes are traditionally classified as a special class of eukaryotic chromosomes different from both autosomes and sex chromosomes A characteristic trait of B chromosomes is their dispensability. B chromosomes are a heterogeneous class of chromosomes found in the nucleus and also are called accessory or supernumerary chromosomes. 2002 by The McGraw-Hill Companies Inc. This leads to a transmission. The maize B chromosome is a non-essential chromosome with an accumulation mechanism.
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B chromosome definition a type of densely staining chromosome of uncertain biological function found in many plant and animal species. Maize lines with B chromosomes have been widely used in studies of centromere functions. B-chromosomes occur widely in flowering plants are devoid of functional genes and display an irregular non-Mendelian mode of inheritance. Wild populations of many. Genetics A supernumeraryextra segment of DNA present in many species which may be driven to self-duplicate as BCs are transmitted at higher rates than otherwise expected from classic mendelian genetics.
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Our data suggested that maize B chromosome influences the A-genome transcription with stronger effect associated with an increase in copy number of B chromosome. Genetics A supernumeraryextra segment of DNA present in many species which may be driven to self-duplicate as BCs are transmitted at higher rates than otherwise expected from classic mendelian genetics. In many respects B chromosomes resemble sex chromosomes so that a common ancestry for them has frequently been suggested. B chromosomes do not contain any structural genes and have a highly variable pattern of inheritance separate from that of the normal chromosomal complement. 2002 by The McGraw-Hill Companies Inc.
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They are also called supernumerary or accessory chromosomes. Therefore they might contain genic regions showing homology with A chromosome sequences. Wild populations of many. B chromosome definition a type of densely staining chromosome of uncertain biological function found in many plant and animal species. Only one of these fragments however would.
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Bivalent pairing is ensured by a gene on chromosome 5 of the B genome Phlocus. Some species however can also carry supernumerary chromosomes referred to as B chromosomes. B chromosome definition a type of densely staining chromosome of uncertain biological function found in many plant and animal species. Previous studies suggested that B chromosomes are evolved from standard chromosomes. Supernumerary chromosomes are the additional or extra chromosomal set present in a cell which are dissimilar to normal A-Chromosomal set in the species.
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The B chromosomes also have the following effects on A chromosomes. Thousands of eukaryotic species harbor dispensable B chromosomes which perpetuate in natural populations as genomic parasites 1 2Recent research has shown that B chromosomes usually carry redundant genetic information already present on the standard A chromosomes 3456The most remarkable exception is the paternal sex ratio PSR B chromosome in the wasp Nasonia. The maize B chromosome is a non-essential chromosome with an accumulation mechanism. B chromosomes are traditionally classified as a special class of eukaryotic chromosomes different from both autosomes and sex chromosomes A characteristic trait of B chromosomes is their dispensability. Other than the essential chromosomes of the genome B chromosomes are expendable and often preferentially inherited.
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B-chromosome A chromosome that occurs in addition to the normal chromosome set A-chromosomes and to which it shows no homology. B chromosomes do not contain any structural genes and have a highly variable pattern of inheritance separate from that of the normal chromosomal complement. The B chromosomes also have the following effects on A chromosomes. Here we discuss the maize B. B chromosomes have functional telomeres that recruit the capping protein HOAP.
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Some species however can also carry supernumerary chromosomes referred to as B chromosomes. B chromosomes have functional telomeres that recruit the capping protein HOAP. Thousands of eukaryotic species harbor dispensable B chromosomes which perpetuate in natural populations as genomic parasites 1 2Recent research has shown that B chromosomes usually carry redundant genetic information already present on the standard A chromosomes 3456The most remarkable exception is the paternal sex ratio PSR B chromosome in the wasp Nasonia. They are also called supernumerary or accessory chromosomes. B-chromosome A chromosome that occurs in addition to the normal chromosome set A-chromosomes and to which it shows no homology.
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The B chromosomes also have the following effects on A chromosomes. Thousands of eukaryotic species harbor dispensable B chromosomes which perpetuate in natural populations as genomic parasites 1 2Recent research has shown that B chromosomes usually carry redundant genetic information already present on the standard A chromosomes 3456The most remarkable exception is the paternal sex ratio PSR B chromosome in the wasp Nasonia. Maize lines with B chromosomes have been widely used in studies of centromere functions. B chromosomes have functional telomeres that recruit the capping protein HOAP. The B chromosomes suppress homologous pairing which reduces multiple pairing between homologous chromosomes in allopolyploids.
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B-chromosome A chromosome that occurs in addition to the normal chromosome set A-chromosomes and to which it shows no homology. B-chromosome A chromosome that occurs in addition to the normal chromosome set A-chromosomes and to which it shows no homology. Other than the essential chromosomes of the genome B chromosomes are expendable and often preferentially inherited. B chromosomes were recently identified in a laboratory stock of Drosophila melanogaster an established model organism with a wealth of genetic and genomic resourcesenabling us to subject them to extensive molecular analysis. B chromosome definition a type of densely staining chromosome of uncertain biological function found in many plant and animal species.
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The maize B chromosome is a non-essential chromosome with an accumulation mechanism. B chromosomes do not contain any structural genes and have a highly variable pattern of inheritance separate from that of the normal chromosomal complement. They are most often found in plants and invertebrat. This leads to a transmission. Source for information on B-chromosome.
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The dispensable nature of the B chromosome facilitates many types of genetic studies in maize. B chromosomes have functional telomeres that recruit the capping protein HOAP. Maize lines with B chromosomes have been widely used in studies of centromere functions. The B chromosomes suppress homologous pairing which reduces multiple pairing between homologous chromosomes in allopolyploids. 2002 by The McGraw-Hill Companies Inc.
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2002 by The McGraw-Hill Companies Inc. B chromosomes were recently identified in a laboratory stock of Drosophila melanogaster an established model organism with a wealth of genetic and genomic resourcesenabling us to subject them to extensive molecular analysis. The dispensable nature of the B chromosome facilitates many types of genetic studies in maize. Maize lines with B chromosomes have been widely used in studies of centromere functions. Source for information on B-chromosome.
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B chromosomes have functional telomeres that recruit the capping protein HOAP. McGraw-Hill Concise Dictionary of Modern Medicine. B-chromosome A chromosome that occurs in addition to the normal chromosome set A-chromosomes and to which it shows no homology. Because of its smaller size and its similarity in composition the initial B chromosome may have been a fragment that broke away from chromosome 4. B chromosomes do not contain any structural genes and have a highly variable pattern of inheritance separate from that of the normal chromosomal complement.
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