Results 41 to 50 of about 86,733 (210)
Genetics and Molecular Biology, 2006 Orcein staining of spermatocytes was used to study the meiotic behavior of holocentric chromosomes in three member of the genus Antiteuchus (commonly known as stink bugs). We describe and illustrate the karyotype of Antiteuchus mixtus, A. sepulcralis and
Cecilia Lanzone, Maria José de Souza
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Oncotarget, 2015 The grass carp (Ctenopharyngodon idella) is one of the most important freshwater fish species in China and the world; grass carp production accounts for about 16% of the world's total freshwater aquaculture [1]. In 2015, Wang et al. performed whole-genome sequencing and de novo assembly for a female (0.9 Gb) and male grass carp (1.07 Gb) by using the ...
Rong Huang, Yaping Wang, Zuoyan Zhu
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BMC Evolutionary Biology, 2011 Background The Erythrinidae fish family is characterized by a large variation with respect to diploid chromosome numbers and sex-determining systems among its species, including two multiple X1X2Y sex systems in Hoplias malabaricus and Erythrinus ...
Trifonov Vladimir +6 more
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BMC Evolutionary Biology, 2007 Background Genetic systems involving multiple X chromosomes have arisen repeatedly in sexually reproducing animals. Tiger beetles (Cicindelidae) exhibit a phylogenetically ancient multiple-X system typically consisting of 2–4 X chromosomes and a single Y.
Vogler Alfried P +2 more
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Dynamics of a sex-linked deleterious mutation in populations subject to sex reversal.
PLoS ONE, 2011 The heterogametic sex chromosomes (i.e. mammalian Y and avian W) do not usually recombine with the homogametic sex chromosomes which is known to lead into rapid degeneration of Y and W due to accumulation of deleterious mutations. On the other hand, some
Markku Karhunen
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Monotreme sex chromosomes - implications for the evolution of amniote sex chromosomes
Reproduction, Fertility and Development, 2009 In vertebrates, a highly conserved pathway of genetic events controls male and female development, to the extent that many genes involved in human sex determination are also involved in fish sex determination. Surprisingly, the master switch to this pathway, which intuitively could be considered the most critical step, is inconsistent between ...
Waters, Paul, Graves, Jennifer
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Nature Communications, 2016 Sex chromosomes can evolve once recombination is halted between a homologous pair of chromosomes. Owing to detailed studies using key model systems, we have a nuanced understanding and a rich review literature of what happens to sex chromosomes once recombination is arrested. However, three broad questions remain unanswered.
Wright, Alison E. +3 more
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Scientific Reports, 2017 Satellite DNAs (satDNAs) constitute large portion of eukaryote genomes, comprising non-protein-coding sequences tandemly repeated. They are mostly found in heterochromatic regions of chromosomes such as around centromere or near telomeres, in intercalary
Octavio Manuel Palacios-Gimenez +6 more
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A state-of-art review of Loricariidae (Ostariophysi: Siluriformes) cytogenetics [PDF]
Neotropical IchthyologyLoricariidae is a Neotropical fish family divided into six subfamilies and ranking in third among the most biodiverse fish groups. This study conducts an updated review of the cytogenetic investigations within the family, discussing the trends in ...
Francisco de Menezes Cavalcante Sassi +2 more
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