Navigation Links
East African cichlid fish offer new understanding of genetic basis of sex determination
Date:10/1/2009

ange blotch" pattern, which appears in some female cichlids that live in rocky areas of Lake Malawi.

"We believe that the orange blotch color pattern emerged as a new mutation in females and has a selective advantage in providing an alternative form of camouflage," says Kocher.

Depending on the surrounding natural background, this color pattern can help disguise female fish and help them avoid predation.

However males who express this phenotype lack the species-specific color patterns used by females to select their mates.

"This phenotype creates a sexual conflict because the allele is favored in females but not favored in males," explains Roberts, who mapped the gene. "In 'survival of the fittest,' the genes underlying a beneficial trait will increase in frequency, but this is an odd case where the trait is really good for females but really bad for males."

Using genomic techniques, Roberts identified the gene (pax7) that is responsible for this difference in color pattern.

He found that the orange blotch (OB) allele that produces the variable pigmentation in females was dominant over the "brown barred" (BB) allele (that produces the more common brown pigmentation) and that it was located very near a female sex determiner.

The genetic conflict that started over color was resolved by a new mutation that took over the sex-determining function, and ensured that nearly all orange blotch fish are female.


'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert

Page: 1 2

Related biology news :

1. Google Earth aids discovery of early African mammal fossils
2. Going bananas for sustainable research -- scientists create fuel from African crop waste
3. Difference in fat storage may explain lower rate of liver disease in African-Americans
4. Cleaning the atmosphere of carbon: African forests out of balance
5. Ancestral genome of present-day African great apes & humans had burst of DNA sequence duplication
6. African-Americans aware and accepting, but often do not receive, the HPV vaccine
7. Nutritional supplementation program helps prevent weight loss among children in African country
8. African thicket rat malaria linked to virulent human form
9. Ancient African exodus mostly involved men, geneticists find
10. Ecological impact of African cities
11. Hypertension develops early, silently, in African-American men
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/18/2014)... world population predicted to reach 9 billion by ... that considers human-altered landscapes such as farmland, according ... habitat that supports it might be an increasingly ... three-quarters of the land surface is directly affected ... human-caused impacts such as climate change. But what ...
(Date:4/18/2014)... adds a twist to the story of how barnyard chickens ... 21 in the journal Proceedings of the National Academy ... chickens that lived 200-2300 years ago in Europe, researchers report ... have looked far different from the chickens we know today. ... associate with modern domestic chickens -- such as their yellowish ...
(Date:4/18/2014)... comet impacts can cause widespread ecological havoc, killing off ... But new research from Brown University shows that impacts ... the time of an impact. , A research team ... of leaves and preserved organic compounds lodged inside glass ... material could provide a snapshot of environmental conditions at ...
Breaking Biology News(10 mins):Stanford researchers rethink 'natural' habitat for wildlife 2Stanford researchers rethink 'natural' habitat for wildlife 3Stanford researchers rethink 'natural' habitat for wildlife 4Ancient DNA offers clues to how barnyard chickens came to be 2Impact glass stores biodata for millions of years 2Impact glass stores biodata for millions of years 3
... to DNA and then cut these "DNA wires" into ... for future computers. , Findings are detailed in a ... the American Chemical Society. The paper was written by ... an assistant professor of biomedical engineering and chemistry at ...
... Ed : Don't miss out the cool movies, link at ... School of Medicine researchers have found a way to exercise ... jump, beat their wings, and fly on command by triggering ... the insects' central nervous systems, according to a new report ...
... Southampton are continuing their pioneering research into diseases such as ... known as prions, thanks to a £300,000 grant from the ... deaths from confirmed or probable variant CJD (vCJD) in the ... by eating food contaminated with prions that is also responsible ...
Cached Biology News:Purdue researchers use enzyme to clip 'DNA wires' 2Purdue researchers use enzyme to clip 'DNA wires' 3Remote control flies? Fly behavior controlled by laser light 2Remote control flies? Fly behavior controlled by laser light 3
(Date:1/15/2014)... 15, 2014 TaiGen Biotechnology Company, Limited ("TaiGen") today ... R-Pharm, a leading Russian pharmaceutical company, to develop and ... Russian Federation , Turkey ... is a novel antibiotic for the treatment of bacterial ...
(Date:1/14/2014)... , Jan. 14, 2014 As pet owners drew up their ... of them wrote: "Take better care of my furry companion." Nowadays ... clothes and top-brand carrying cases to take the little canine or ... also feel compelled to buy some pricey toys at the pet ...
(Date:1/14/2014)... 14, 2014 In recent years, growing ... methods in product development and promotion has led to ... mistrust, fueled by concerns about the insidious impact of ... of spectacular fines to the world’s biggest pharmas for ...
(Date:1/14/2014)... 14, 2014 Kerr Corporation, a leading manufacturer ... additional how-to information about dual arch impressions on its dental ... Arch Impressions,” the blog entry serves up a list of ... a step-by-step demonstration by Dr. David Little as he crafts ...
Breaking Biology Technology:TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3
... RALEIGH, N.C., Dec. 11 Campbell Alliance, ... pharmaceutical and,biotechnology industries, today announced that Tony ... Distribution practice, will serve as conference,chairperson at ... EDI Data Management Conference. The event will ...
... Dec. 10 Tutogen Medical, Inc.,(Amex: TTG ), a ... and animal (xenograft) tissue, today announced,financial results for the fiscal ... of 2007 Highlights for the fiscal year include:, ... -- Sales of dental products increased 38% in fiscal ...
... Board: SCIE) announced today that Jim Dorst has joined ... Financial Officer., Jim Hitchin the Company,s CEO said, ... public medical device, manufacturing and software firms. His,experience goes ... a graduate,degree in accounting, he is well suited for ...
Cached Biology Technology:Campbell Alliance Trade and Distribution Practice to Chair CBI 3rd Annual Fee for Service and EDI Data Management Conference 2Tutogen Medical, Inc. Reports Year-End Fiscal 2007 Financial Results 2Tutogen Medical, Inc. Reports Year-End Fiscal 2007 Financial Results 3Tutogen Medical, Inc. Reports Year-End Fiscal 2007 Financial Results 4Tutogen Medical, Inc. Reports Year-End Fiscal 2007 Financial Results 5Tutogen Medical, Inc. Reports Year-End Fiscal 2007 Financial Results 6Tutogen Medical, Inc. Reports Year-End Fiscal 2007 Financial Results 7Tutogen Medical, Inc. Reports Year-End Fiscal 2007 Financial Results 8Tutogen Medical, Inc. Reports Year-End Fiscal 2007 Financial Results 9Tutogen Medical, Inc. Reports Year-End Fiscal 2007 Financial Results 10Jim Dorst Joins SpectraScience as CFO 2
Anti-GOSR2 Monoclonal AntibodyOther Sub-Family: not assigned-Other Applications: Immunocytochemistry, Immunoprecipitation, Western Blot...
... combines shaking and rocking for maximal fluid movement. ... mm stainless steel or acrylic platform, it is ... operation. The platform angle is easily adjusted from ... action and rotation speed of platform is adjusted ...
... The Experion HighSens analysis kit for ... required to perform high-sensitivity RNA analysis (at ... system. This kit includes 25 RNA HighSens ... gel, 2 x 20 microliters RNA HighSens ...
... kit provides all the accessories necessary for ... conformation polymorphism analysis (SSCP) with the DCode ... a cooling finger adaptor for use with ... of 20 cm plates, 2 sets of ...
Biology Products: