Results 241 to 250 of about 8,958,760 (291)
Cattle T2T X Chromosome: Insights into Natural Neocentromere Evolution
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Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms, 2008
Fragile sites are heritable specific chromosome loci that exhibit an increased frequency of gaps, poor staining, constrictions or breaks when chromosomes are exposed to partial DNA replication inhibition. They constitute areas of chromatin that fail to compact during mitosis. They are classified as rare or common depending on their frequency within the
Jean-Pierre Fryns, T. Lukusa
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Fragile sites are heritable specific chromosome loci that exhibit an increased frequency of gaps, poor staining, constrictions or breaks when chromosomes are exposed to partial DNA replication inhibition. They constitute areas of chromatin that fail to compact during mitosis. They are classified as rare or common depending on their frequency within the
Jean-Pierre Fryns, T. Lukusa
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Current Opinion in Genetics & Development, 1995
The construction of integrated maps at all levels of resolution will facilitate determination of the DNA sequence and, ultimately, the entire gene content of the human genome. In the past two years, the need for extensive frameworks on which to anchor the maps of the human chromosomes has been emphasized. The first framework has been provided following
David R. Bentley, Ian Dunham
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The construction of integrated maps at all levels of resolution will facilitate determination of the DNA sequence and, ultimately, the entire gene content of the human genome. In the past two years, the need for extensive frameworks on which to anchor the maps of the human chromosomes has been emphasized. The first framework has been provided following
David R. Bentley, Ian Dunham
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Inversions on human chromosomes
American Journal of Medical Genetics Part A, 2022AbstractHuman chromosome inversions are types of balanced structural variations, making them difficult to analyze. Thanks to PEM (paired‐end sequencing and mapping), there has been tremendous progress in studying inversions. Inversions play an important role as an evolutionary factor, contributing to the formation of gonosomes, speciation of ...
Klara Kosuthova, Roman Solc
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Archives of Pediatrics & Adolescent Medicine, 1961
The purpose of this paper is to present a nonencyclopedic review of this rapidly growing field. The focus will be on the new methodologies involved, their accomplishments, their limitations, and their potentialities, in the hope of enabling the reader to examine with more understanding the many publications appearing in the clinical literature on the ...
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The purpose of this paper is to present a nonencyclopedic review of this rapidly growing field. The focus will be on the new methodologies involved, their accomplishments, their limitations, and their potentialities, in the hope of enabling the reader to examine with more understanding the many publications appearing in the clinical literature on the ...
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Human Reproduction, 1988
Sperm chromosome studies have been performed in 70 normal males. The incidence of aneuploidy in this group is approximately 3-4%, and that of structural anomalies close to 5%. In carriers of reciprocal or Robertsonian translocations, the results are extremely variable, with percentages of unbalanced sperm from 8 to 87%.
J. Benet +6 more
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Sperm chromosome studies have been performed in 70 normal males. The incidence of aneuploidy in this group is approximately 3-4%, and that of structural anomalies close to 5%. In carriers of reciprocal or Robertsonian translocations, the results are extremely variable, with percentages of unbalanced sperm from 8 to 87%.
J. Benet +6 more
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Heteropycnosis in Human Chromosomes
Nature, 1950INVESTIGATORS of human chromosomes noticed many years ago the presence of two chromatic masses or chromocentres in resting nuclei. On the other hand, Schultz1 was able to analyse in male human material the structure of a couple of elements pairing at pachytene during spermatogenesis, each spatially connected with a nucleolus, and, therefore, called ...
P. Feletig, C. Barigozzi
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Archives of General Psychiatry, 1972
A cytogenic study of 16 opiate addicts receiving methadone hydrochloride compared with a control population revealed an unusual number of chromosome aberrations including dicentric chromosomes and an exchange figure at 72 hours in the addicted group, but no significant increase in chromosome anomalies over the controls at 48 hours. To determine whether
Rusha B. Jordan +4 more
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A cytogenic study of 16 opiate addicts receiving methadone hydrochloride compared with a control population revealed an unusual number of chromosome aberrations including dicentric chromosomes and an exchange figure at 72 hours in the addicted group, but no significant increase in chromosome anomalies over the controls at 48 hours. To determine whether
Rusha B. Jordan +4 more
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The human Y chromosome: a masculine chromosome
Current Opinion in Genetics & Development, 2006Once considered to be a genetic wasteland of no scientific interest beyond sex determination, the human Y chromosome has made a significant comeback in the past few decades and is currently implicated in multiple diseases, including spermatogenic failure - absent or very low levels of sperm production.
Michiel J. Noordam, Sjoerd Repping
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Genomics and genetics of human and primate y chromosomes.
Annual review of genomics and human genetics (Print), 2012In mammals, the Y chromosome plays the pivotal role in male sex determination and is essential for normal sperm production. Yet only three Y chromosomes have been completely sequenced to date--those of human, chimpanzee, and rhesus macaque.
Jennifer F. Hughes, S. Rozen
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