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Latest Ploidy Stories

2014-02-04 11:35:43

New insights into how the cells in our bodies divide could improve our knowledge of a condition linked to cancer, a study suggests. Errors in the cell division process – which allows us to grow and stay healthy – can lead to a genetic disorder called aneuploidy, which is also associated with birth defects and infertility. Researchers at the University of Edinburgh have pinpointed the key role played by a protein in ensuring that cells separate correctly. During cell division,...

Brown University
2014-01-06 08:12:29

Brown University Mating and meiosis – the specialized cell division that reduces the number of chromosomes in a cell – are related, but in most yeasts they are regulated separately. Not so in Candida lusitaniae, where the two programs work in unison, according to a new study in Nature. Comparison with other species suggests that this fusion may support C. lusitaniae’s “haploid lifestyle” of maintaining only one set of chromosomes in each cell. From a biological point of view,...

2013-11-26 14:25:32

Plants can reproduce in a multitude of different ways, unlike humans and animals. Scientists at the University of Veterinary Medicine Vienna have been working on developing new varieties of chamomile that can be cultivated as a medicinal plant. The researchers have been trying to identify varieties that will bloom longer and make its cultivation easier. Their methods and results have recently been published in the scientific press. Chamomile is a medicinal plant used mainly in the...

Scientists Discover Aneuploidy In Single-celled Organisms
2013-08-14 14:57:39

University of Luxembourg Baker's yeast is a popular test organism in biology. Yeasts are able to duplicate single chromosomes reversibly and thereby adapt flexibly to environmental conditions. Scientists from the Luxembourg Centre for Systems Biomedicine (LCSB) of the University of Luxembourg, in collaboration with colleagues from the US Institute for Systems Biology (ISB) in Seattle, have now systematically studied the genetics of this process, which biologists refer to as aneuploidy. The...

Plant Chromosome Number Variation From Mediterranean Coasts To Tatra Mountains And Beyond
2012-11-27 15:37:25

Pensoft Publishers Chromosome number is the most basic feature concerning the genome of a species, and it is known for about one third of higher plant species. In particular, for plants of Italy, Slovakia, and Poland, online chromosome number databases have been developed: 'Chrobase.it — Chromosome numbers for the Italian flora', 'Karyological database of ferns and flowering plants of Slovakia' and 'Chromosome number database — PLANTS', respectively. The three datasets account...

Extra Set Of Chromosomes Commonly Carried By Western Aspen Trees
2012-11-01 07:01:47

Public Library of Science Over 60 percent of aspen in parts of Utah, Colorado are triploid, new study shows A large proportion of aspen in the western U.S. sport an extra set of chromosomes in their cells, a phenomenon termed triploidy, according to new research published Oct. 31 in the open access journal PLoS ONE by Karen Mock from Utah State University and colleagues at several other institutions. In some areas of southern Utah and Colorado, over 60% of aspen trees are triploid....

Does Polyploidy Play A Role In The Italian Endemic Flora?
2012-05-22 08:24:01

Besides the obvious differences between plants and animals, subtle ones lie concealed within the cell, even within the nucleus. In both plant and animal cells, the nucleus contains DNA, which condenses into chromosomes during cell division. Chromosomes can be counted at that stage, revealing the chromosome number for each species. Here comes a difference: while the chromosome number spans a relatively short range across animal species (2-296: 46 in man), some plant species have over 1000...

From Embryonic Stem Cells, A Sperm Replacement And Easier Path To Genetic Modification
2012-04-26 10:39:13

Researchers reporting in the April 27 issue of the journal Cell , a Cell Press publication, have devised a new and improved method for producing genetically modified animals for use in scientific research. The method relies on haploid embryonic stem cells (haESCs) instead of sperm to artificially fertilize immature egg cells. Such stem cells are similar to sperm in that they carry only genetic material from a mouse "dad." Not only will the advance make it easier to produce genetically...

Image 1 - Chromosome Analyses Of Prickly Pear Cacti Reveal Southern Glacial Refugia
2012-02-15 04:21:46

Analysis of chromosome number variation among species of a North American group of prickly pear cacti (nopales) showed that the most widespread species encountered are of hybrid origin. Those widespread species likely originated from hybridization among closely related parental species from western and southeastern North America. This study was published in the open access journal Comparative Cytogenetics. The prickly pear cacti (of the genus Opuntia) are endemic to the Americas. The genus...


Word of the Day
tesla
  • The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.
This word is named for Nikola Tesla, the inventor, engineer, and futurist.