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:1/19/2017)... 19, 2017 According to a new report published by ... - 2022," the global biometric sensor market is expected to garner $1.5 billion ... 2015, Asia-Pacific dominated the global market and contributed over ... Continue Reading ... ...
(Date:1/12/2017)... Jan. 12, 2017  Trovagene, Inc. (NASDAQ: ... technologies, today announced that it has signed agreements with ... and the Middle East for ... marks the first wave of international distribution agreements for ... blood samples. The initial partners will introduce ...
(Date:1/6/2017)... , Jan. 6, 2017  Privately-held CalciMedica, ... studies in healthy volunteers of a novel calcium ... treat acute pancreatitis. Acute pancreatitis, ... a mild disorder, but can be very serious.  In ... and sepsis, where extended hospital stays, time in ...
Breaking Biology News(10 mins):
(Date:1/24/2017)... India , January 24, 2017 According to ... Culture, Cell Expansion, Cell Counting, Cell Line Development, Flow Cytometry, Single-Use Bioprocessing, ... to 2021", published by MarketsandMarkets, the global market is expected to reach ... a CAGR of 12.4% from 2016 to 2021. ... ...
(Date:1/24/2017)... 2017  Bruker today announced that it ... in the development, manufacture, and sale of ... innovative nanomechanical testing instruments to Bruker,s existing ... profilometers, and tribology and mechanical testing systems, ... research markets. Hysitron,s 2016 revenues were approximately ...
(Date:1/24/2017)... ... January 24, 2017 , ... Amendia, Inc., designer, developer, ... F. McAllister as Executive Vice President and Chief Financial Officer. , Steve has ... markets. Beginning his career at Howmedica, Inc., he has since served in various ...
(Date:1/24/2017)... , ... January 24, 2017 , ... ... available malaria Plasmodium falciparum culture panels with standard concentrations of histidine rich protein ... available in a range of concentrations from six different malaria strains, are intended ...
Breaking Biology Technology: