Navigation Links
Scientists alter sexual orientation in worms
Date:10/25/2007

important. There is redundancy. The system is flexible.

-- Next, we took the hermaphrodite brain and we activated the genes that determine maleness, but only in the brain and not in the rest of the worm, Jorgensen says. Hermaphrodites with masculine brains were attracted to other hermaphrodites.

The results show sexual orientation is wired into the brain in both sexes of worm.

To masculinize the brains of hermaphroditic worms, the researchers activated a gene named fem-3, but only in the nervous system. The fem-3 gene makes the body develop male structures such as a tail, which male worms use for copulation. With the gene active only in the brain, the hermaphrodites still had the same bodies and genitalia, but their brains were male, so they were attracted to other hermaphrodites.

To demonstrate the hermaphrodites produce sexual attractants or pheromones, the researchers washed hermaphrodites, and put some of the wash water on agar, a jelly-like growth medium, in a culture dish. When worms were placed on the dish, males moved toward the hermaphrodite wash water while hermaphrodites moved away.

When the scientists genetically altered hermaphrodites brains to change their sexual orientation, they crawled toward the pheromones of other hermaphrodites.

"People debate whether the brain is influenced by sexual hormones from the gonads or whether the behavior is derived from the brain alone, Jorgensen says. In this case, its clear the brain is sexualized. The surprise was that sensory neurons found in the hermaphrodite brain are involved in sexual attraction in males.


'/>"/>

Contact: Lee Siegel
leesiegel@ucomm.utah.edu
801-581-8993
University of Utah
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Wisconsin scientists grow critical nerve cells
2. Scientists ID molecular switch in liver that triggers harmful effects of saturated and trans fats
3. UCSB scientists probe sea floor venting to gain understanding of early life on Earth
4. UAB scientists discover the origin of a mysterious physical force
5. Fox Chase Cancer Center scientists identify immune-system mutation
6. Scientists Replicate Hepatitis C Virus in Laboratory
7. Scientists detect probable genetic cause of some Parkinsons disease cases
8. Scientists find missing enzyme for tuberculosis iron scavenging pathway
9. Scientists seek answers on what activates deadly anthrax spores
10. Yale Scientists Find MicroRNA Regulates Ras Cancer Gene
11. Scientists collaborate to assess health of global environment
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/31/2015)... , 31 de julio de 2015 La ... ) se celebrará por medio de BGI del 22 al 25 ... . Este año, la conferencia celebra su ... se ha convertido en una de las reuniones anuales más ... una de las reuniones más dinámicas, entusiastas y mejores a ...
(Date:7/31/2015)... , July 31, 2015 The 10 th ... held by BGI from October 22-25, 2015, in Shenzhen ... The conference is celebrating its 10 th anniversary this year. ... the world,s most influential annual meetings in the ,omics, fields, ... scientific gatherings. ICG-10 focuses on recent breakthroughs ...
(Date:7/27/2015)... 27, 2015   Zynx Health ™, the ... improvement solutions, today announced that its ZynxCarebook ... on Android smartphones and tablets. With this expansion, ... can use ZynxCarebook to securely exchange messages and ... care transitions to other care settings, and improve ...
Breaking Biology News(10 mins):La 10th International Conference on Genomics (ICG-10) se llevará a cabo en octubre 2La 10th International Conference on Genomics (ICG-10) se llevará a cabo en octubre 3The 10th International Conference on Genomics (ICG-10) to Open in October 2Zynx Health Adds Android Device Support to ZynxCarebook Solution 2Zynx Health Adds Android Device Support to ZynxCarebook Solution 3
... genetic material in our cells are iconically depicted as ... cell is about to divide and the entire contents of ... to get a good picture of the way that our ... is neatly bundled into the nucleus while enabling day-to-day (non-dividing) ...
... (Nov. 25 2013) After Schwann cells (SCs), the principal ... (OECs), cells that ensheath the non-myelinated peripheral neurons in the ... researchers in Beijing, China put the rats on a 30 ... determine if the effects of the workouts would benefit aspects ...
... as they are "smart": too elementary to be able to ... by inserting pieces of their own DNA so that it ... first have to inject their own genetic material into the ... Micheletti from SISSA (the International School for Advanced Studies in ...
Cached Biology News:Chromosomes show off their shapes 2Co-transplanted cells and treadmill training aids rats with spinal cord injury 2Tidy knots are faster 2
(Date:7/30/2015)... AACC welcomed thousands of medical professionals ... Meeting & Clinical Lab Expo in ... showcased revolutionary advancements in clinical testing technology and ... to diagnose patients quickly and accurately and make ... As of Wednesday, July 29, more than ...
(Date:7/30/2015)... Washington , July 30, 2015 ... Market, by Product (Software, Molecular Modeling, PB/PK, PKPD, Trial ... Discovery & Development, Preclinical, Clinical Trial), by End Users ... Biosimulation Market is expected to reach USD 2,107.99 million ... a CAGR of 15.29%. Browse more ...
(Date:7/30/2015)... 60,000 customers across the globe, ISN improves the efficiency and effectiveness of contractor management ... safe and reliable contractors in over 80 countries. ... ... Over 60,000 Worldwide Customers In More Than 80 ... Headquartered in Dallas, TX , ISN has additional offices in ...
(Date:7/30/2015)... , ... July 30, 2015 , ... As part of its 2015 growth plan and ... and technical service business units, Whitehouse Laboratories is pleased to announce that it ... to the Container Center of Excellence and will be strictly dedicated to basic USP 51, ...
Breaking Biology Technology:Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 2Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 3Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 4Biosimulation Market Worth 2,107.99 Million USD by 2020 2Biosimulation Market Worth 2,107.99 Million USD by 2020 3Biosimulation Market Worth 2,107.99 Million USD by 2020 4ISN Reaches Over 60,000 Worldwide Customers 2ISN Reaches Over 60,000 Worldwide Customers 3Whitehouse Labs Formally Announces Plans to Open a Microbiological Laboratory 2
... Cell Therapeutics, Inc. ("CTI") (Nasdaq and MTA: CTIC) today ... offer (the "Exchange Offer") to exchange shares of its common ... aggregate of $89.2 million principal amount for the following outstanding ... , 4% Convertible Senior ...
... , - German Chemical Parks Record ... The number of employees in German chemical parks has ... this same period, the number of,companies doing business at these ... by Dr. Klaus-Dieter Juszak, Chairman of the,German Sector Group of ...
... (NYSE: LLY ) will unveil data from more ... American Society of Clinical Oncology (ASCO) in Orlando, Fla. from ... the presentations continuing to support Lilly,s leadership in thoracic cancer ... on ALIMTA(R) (pemetrexed for injection), as well as GEMZAR(R) (gemcitabine ...
Cached Biology Technology:Cell Therapeutics to Exchange up to $89.2 million of Its Outstanding Convertible Notes in a 'Modified Dutch Auction' Tender Offer 2Cell Therapeutics to Exchange up to $89.2 million of Its Outstanding Convertible Notes in a 'Modified Dutch Auction' Tender Offer 3Cell Therapeutics to Exchange up to $89.2 million of Its Outstanding Convertible Notes in a 'Modified Dutch Auction' Tender Offer 4Cell Therapeutics to Exchange up to $89.2 million of Its Outstanding Convertible Notes in a 'Modified Dutch Auction' Tender Offer 5Cell Therapeutics to Exchange up to $89.2 million of Its Outstanding Convertible Notes in a 'Modified Dutch Auction' Tender Offer 610,000 New Jobs, Investments Increased 210,000 New Jobs, Investments Increased 3Lilly Set to Unveil More Than 50 Studies at ASCO 2009 2Lilly Set to Unveil More Than 50 Studies at ASCO 2009 3Lilly Set to Unveil More Than 50 Studies at ASCO 2009 4Lilly Set to Unveil More Than 50 Studies at ASCO 2009 5Lilly Set to Unveil More Than 50 Studies at ASCO 2009 6
...
... Fingerprinting II ... is an optional ... principal component analysis, ... analysis and MANOVA, ...
Fingerprinting II Informatix optional matrix types module, is an optional module that adds external similarity and distance matrix functions to the Fingerprinting II Informatix software package....
... thermal cycler is a completely redesigned and ... and it accepts the full line of ... same precision in thermal performance as the ... cyclers, allowing easy transport of protocols among ...
Biology Products: