Navigation Links
How do you know whether you are male or female?
Date:12/26/2007

New research published online this week in the open-access journal PLoS Biology investigates this basic and much-studied question in the fruit fly, and comes to a surprising new conclusion.

In mammals, male or female development depends on the presence of the Y chromosome, which is only found in males because it includes masculinizing genes. But other animal groups have evolved different systems. James Erickson and Jerome Quintero at Texas A&M University studied the mechanism of sex determination in the fruit fly, Drosophila melanogaster.

Previous studies in the fly suggested that it was the ratio of X chromosomes (the female chromosome, of which there are two copies in a female fly, and just one in a male) to the non-sex chromosomes (the autosomes) that determined the sex of a fly embryo. However, this new paper indicates that rather than being dependent on the ratio, it is the number of X chromosomes that is important. Sex is determined during a very specific and short stage in embryo development, and only two X chromosomes can produce enough of a signal to feminize the embryo during this window of opportunity.


'/>"/>

Contact: Natalie Bouaravong
press@plos.org
415-568-3445
Public Library of Science
Source:Eurekalert

Page: 1

Related biology news :

1. Gene determines whether male body odor smells pleasant
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2017)... , April 17, 2017 NXT-ID, Inc. ... company, announces the filing of its 2016 Annual Report on Form ... Exchange Commission. ... Form 10-K is available in the Investor Relations section of the ... on the SEC,s website at http://www.sec.gov . 2016 ...
(Date:4/11/2017)... N.Y. , April 11, 2017 ... fingerprints, but researchers at the New York University ... College of Engineering have found that partial similarities ... security systems used in mobile phones and other ... thought. The vulnerability lies in the ...
(Date:4/5/2017)... KEY FINDINGS The global market for stem ... 25.76% during the forecast period of 2017-2025. The rise ... growth of the stem cell market. Download ... The global stem cell market is segmented on the ... cell market of the product is segmented into adult ...
Breaking Biology News(10 mins):
(Date:6/22/2017)... (PRWEB) , ... June 22, 2017 , ... ... media network RegMedNet has produced a Spotlight series on ... scholarly reviews and perspectives by leading experts on the unique regulatory challenges of ...
(Date:6/22/2017)... ... June 22, 2017 , ... The first human cell line HeLa, established ... first data on cross-contamination of human cell lines with HeLa cells were published. Until ... cell culture labs and is associated with dramatic consequences for research. , In ...
(Date:6/22/2017)... ... June 22, 2017 , ... Charm Sciences, Inc. is pleased to ... was determined to be appropriate as a screening test at dairies and farms for ... EZ system, and the Charm EZ Lite system. These systems are a combination incubator ...
(Date:6/20/2017)... ... , ... Biologist Dawn Maslar MS has found a biomarker that she claims ... Choose: The Neuroscience of Meeting, Dating, Losing Your Mind, and Finding True Love, Maslar ... next step, in my estimation, was to scientifically track the evidence of commitment in ...
Breaking Biology Technology: