Abstract:
:The karyotype of the pine woods treefrog, Hyla femoralis, is characterized by primitive XY female/XX male sex chromosomes. The sole difference between the X and the Y is the presence of a nucleolus organizer region (NOR) in the X. Due to a deletion of the NOR in the Y, this chromosome is distinctly smaller than the X. Since no autosomal NORs exist in the karyotype of this species, the NOR deletion in the Y results in a sex-specific difference in the number of ribosomal RNA genes, with a female:male ratio of about 2:1. Interphase nuclei of male animals contain always one silver-stained nucleolus, whereas most nuclei of female specimens exhibit two nucleoli. This is in agreement with the absence of dosage compensation for sex-linked genes in amphibian cells. The consequences of the loss of about 50% of ribosomal RNA genes for the viability of male individuals and spermatogenesis are discussed.
journal_name
Cytogenet Genome Resjournal_title
Cytogenetic and genome researchauthors
Schmid M,Steinlein Cdoi
10.1159/000073421keywords:
subject
Has Abstractpub_date
2003-01-01 00:00:00pages
74-9issue
1eissn
1424-8581issn
1424-859Xpii
73421journal_volume
101pub_type
杂志文章abstract::The article reviews the existing methods of multicolor FISH on nuclear targets, first of all, interphase chromosomes. FISH proper and image acquisition are considered as two related components of a single process. We discuss (1) M-FISH (combinatorial labeling + deconvolution + wide-field microscopy); (2) multicolor la...
journal_title:Cytogenetic and genome research
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章,评审
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journal_title:Cytogenetic and genome research
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更新日期:2003-01-01 00:00:00
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journal_title:Cytogenetic and genome research
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章
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更新日期:2013-01-01 00:00:00
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journal_title:Cytogenetic and genome research
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journal_title:Cytogenetic and genome research
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更新日期:2012-01-01 00:00:00
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000506033
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journal_title:Cytogenetic and genome research
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journal_title:Cytogenetic and genome research
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章,评审
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更新日期:2002-01-01 00:00:00
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000342360
更新日期:2013-01-01 00:00:00
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000227831
更新日期:2009-01-01 00:00:00
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000447111
更新日期:2016-01-01 00:00:00
abstract::The genus Hypostomus has a broad geographic distribution in Brazilian rivers and comprises armored catfishes with a very complicated taxonomy due to the absence of morphological autapomorphies. The existence of nearly 10 allopatric populations with different karyotypes suggests that Hypostomusancistroides represents a...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000492959
更新日期:2018-09-28 00:00:00
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章,评审
doi:10.1159/000094207
更新日期:2006-01-01 00:00:00
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000334709
更新日期:2012-01-01 00:00:00
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章,评审
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更新日期:2007-01-01 00:00:00
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journal_title:Cytogenetic and genome research
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更新日期:2013-01-01 00:00:00
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journal_title:Cytogenetic and genome research
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更新日期:2003-01-01 00:00:00
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journal_title:Cytogenetic and genome research
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更新日期:2016-01-01 00:00:00
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journal_title:Cytogenetic and genome research
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abstract::Recent studies of the LTR-retrotransposons of Schizosaccharomyces pombe have shed considerable light on their evolution and function. The sequencing of the S. pombe genome allowed analysis of its transposon content. This analysis provides information about the maintenance and loss of transposons in the genome. The res...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000084990
更新日期:2005-01-01 00:00:00
abstract::Approximately 15 patients with partial trisomy 9p involving de novo duplications have been previously described. Here, we present clinical, cytogenetic, FISH and aCGH findings in a patient with a de novo complex rearrangement in the short arm of chromosome 9 involving an inverted duplication at 9p24-->p21.3 and a dele...
journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000251966
更新日期:2009-01-01 00:00:00
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000151320
更新日期:2008-01-01 00:00:00
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章,评审
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更新日期:2004-01-01 00:00:00
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000071589
更新日期:2002-01-01 00:00:00
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000095924
更新日期:2006-01-01 00:00:00
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journal_title:Cytogenetic and genome research
pub_type: 杂志文章
doi:10.1159/000314096
更新日期:2010-07-01 00:00:00