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Latest Cytogenetics Stories

2011-07-06 15:32:38

At present, when a woman undergoes preimplantation genetic screening (PGS) in a fertility clinic, doctors are trying to select an egg or an embryo that is healthy and doesn't have a chromosome abnormality such as an extra copy of chromosome 21, which causes Down's syndrome. In order to establish this, they either have to biopsy a part of the egg called the polar body or remove a cell from the embryo for screening. Both procedures are expensive, invasive and can damage the egg or embryo. Dr...

2011-07-05 12:14:03

Ovarian stimulation undertaken by women of advanced maternal age (over 35 years) receiving fertility treatment may be disrupting the normal pattern of meiosis "“ a critical process of chromosome duplication followed by two specialized cell divisions in the production of oocytes and sperm "“ and leading to abnormalities of chromosome copy numbers (aneuploidy) that result in IVF failure, pregnancy loss or, more rarely, the birth of affected children with conditions such as Down's...

2011-07-04 12:49:36

ESHRE study may answer the question in older women Ovarian stimulation undertaken by women of advanced maternal age (over 35 years) receiving fertility treatment may be disrupting the normal pattern of meiosis "“ a critical process of chromosome duplication followed by two specialised cell divisions in the production of oocytes and sperm "“ and leading to abnormalities of chromosome copy numbers (aneuploidy) that result in IVF failure, pregnancy loss or, more rarely, the birth of...

2011-05-12 08:37:00

OMAHA, Neb., May 12, 2011 /PRNewswire/ -- Transgenomic, Inc. (OTC/BB: TBIO) today announced the following Webcast: Transgenomic, Inc. First Quarter 2011 Financial Results and What: Business Update Conference Call When: Thursday, May 12, 2011 @ 5:00 p.m. Eastern Where: http://www.transgenomic.com/events.asp?id=6 Live over the Internet --Simply log on to the web at the How: address above. Contact:...

2011-05-03 22:47:39

Plants adapt to the local weather and soil conditions in which they grow, and these environmental adaptations are known to evolve over thousands of years as mutations slowly accumulate in plants' genetic code. But a University of Rochester biologist has found that at least some plant adaptations can occur almost instantaneously, not by a change in DNA sequence, but simply by duplication of existing genetic material. Justin Ramsey's findings are published in the current Proceedings of the...

2011-04-21 23:03:29

A study of DNA rearrangements in roundworm chromosomes may offer new insight into large-scale genome duplications that occur in developing tumors. A report of the research led by University of North Carolina at Chapel Hill School of Medicine scientists was published in the April 22 online edition of the journal Science. The study focused on telomeres, a region of repetitive DNA sequence that protects the ends of chromosomes from deterioration or from fusing with other chromosomes. In many...

2011-04-14 21:03:08

Egg cells failing to properly arrange chromosomes Washington State University researchers have confirmed a critical step in cell division that results in age-related miscarriages and birth defects, including Down syndrome. Writing in the upcoming issue of the journal "Current Biology," the researchers say they recreated the conditions in which an egg cell will continue to undergo cell division without properly arranging its chromosomes, creating offspring with aneuploidy, or an abnormal...

2011-04-11 15:40:30

The evolution and diversification of the more than 300,000 living species of flowering plants may have been "jump started" much earlier than previously calculated, a new study indicates. According to Claude dePamphilis, a professor of biology at Penn State University and the lead author of the study, which includes scientists at six universities, two major upheavals in the plant genome occurred hundreds of millions of years ago -- nearly 200 million years earlier than the events that other...

2011-04-08 09:21:00

Four Mexican Laboratories Selected for Cytogenetics Standardization Pilot Project MEXICO CITY, April 8, 2011 /PRNewswire-USNewswire/ -- A workshop being held today will serve as the launch of a unique project that unites the American Society of Hematology (ASH), the Agrupacion Mexicana para el Estudio de la Hematologia (AMEH), and the National Cancer Institute (NCI) in pursuit of a common goal: improving the care of patients with acute myeloid leukemia (AML). The key to successfully...

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2011-03-03 09:55:00

Vive le difference? Not at the level of DNA. Men must increase gene expression on their lone X-chromosome to match the two X's possessed by women. A new study explains just how men manage to do that. What makes a man? His clothes? His car? His choice of scotch? The real answer, says Brown University biologist Erica Larschan, is the newly understood activity of a protein complex that, like a genetic power tool, gives enzymes on the X-chromosome an extra boost to increase gene expression. The...


Word of the Day
reremouse
  • A bat.
The word 'reremouse' comes from Middle English reremous, from Old English hrēremūs, hrērmūs ("bat"), equivalent to rear (“to move, shake, stir”) +‎ mouse.
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