Navigation Links
Why female moths are big and beautiful
Date:3/11/2010

In most animal species, males and females show obvious differences in body size. But how can this be, given that both sexes share the same genes governing their growth? University of Arizona entomologists studied this conundrum in moths and found clues that had been overlooked by previous efforts to explain this mystery of nature.

Take a look around in the animal world and you will find that, in most organisms, individuals of one sex are larger than the other of the species.

Even though evolutionary biologists have long recognized this discrepancy, called sexual dimorphism, they have struggled for decades to solve a major paradox: How can males and females of one species be of different sizes, given that they share the same genetic blueprints dictating their development and growth?

Researchers from the University of Arizona have discovered that the key to unraveling this mystery lies in the early developmental stages during which the sexes begin to grow apart and that females can respond to selection on size almost twice as fast as can males.

Their findings are published online before print in Proceedings of the Royal Society of London, Series B.

"In mammals, the males tend to be larger because there is an advantage in being bigger and stronger when it comes to fighting over who gets the female," explained Craig Stillwell, lead author of the study and a UA Center for Insect Science postdoctoral fellow in the lab of Goggy Davidowitz, an assistant professor of entomology at the UA.

"In most arthropods, on the other hand, we find the opposite: the females are bigger than the males. Think of spiders, for example. In some species, the female can be hundreds of times larger than the male.

"The question we asked was, 'how do females and males come to be different in size?'"

Many biologists have tried to solve this puzzle over time, but when Stillwell and Davidowitz looked
'/>"/>

Contact: Daniel Stolte
stolte@email.arizona.edu
520-626-4402
University of Arizona
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Sex is thirst-quenching for female beetles
2. UT Southwestern researchers identify hundreds of genes controlling female fertility
3. Why do males and females frequently differ in body size and structure?
4. X-effect: female chromosome confirmed a prime driver of speciation
5. Vaginal reconstruction not needed for most inter-sex females, Hopkins study shows
6. Gene in male fish lures females into sex
7. New evidence for female control in reproduction
8. Men unaware of their cancer risk when female relatives test positive for BRCA mutation
9. How do you know whether you are male or female?
10. Female katydids prefer mates cool in winter and hot in summer
11. Female concave-eared frogs draw mates with ultrasonic calls
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Why female moths are big and beautiful
(Date:6/17/2015)... Deutschland und GERMANTOWN, Maryland , June ... ®   Produktlinie mit DNA-Tests verbessert den ... (NASDAQ: QGEN ; Frankfurt Prime Standard: QIA) hat ... STR-Testkits der Produktlinie Investigator ® ... Markt eingeführt. Die neuen Kits zur Erstellung genetischer Fingerabdrücke ...
(Date:6/16/2015)... , June 16, 2015  With the increasing ... security remains a top concern. The recent compromise of ... the need for strong authentication within government agencies. ... a biometric one-time password (OTP) authenticator, has been submitted ... (FIPS) 140-2 Level 3 validation for tamper proofing. ...
(Date:6/15/2015)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... commerce market, announces that its leading payment security technology, the ... Experience! @ NYC June 18th. Digital Experience! @ ... in technology to over 300 of the top media covering ... Pavilion in New York City from ...
Breaking Biology News(10 mins):QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 2QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 3QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 4QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 5QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 6Government Ready Biometric Security Approaching as HYPR Corp. Files FIPS 140-2 Level 3 Validation for Its Proprietary Biometric Token 2Government Ready Biometric Security Approaching as HYPR Corp. Files FIPS 140-2 Level 3 Validation for Its Proprietary Biometric Token 3Wocket Smart Wallet Exhibiting at Pepcom Digital Experience! @ NYC June 18th 2Wocket Smart Wallet Exhibiting at Pepcom Digital Experience! @ NYC June 18th 3
... finding life on other planets and in extreme environments ... new astrobiology initiative under a five-year grant from NASA,s ... Beyond." Christopher H. House, associate professor of geosciences, ... detect and characterize life, look for biological signatures in ...
... storms will continue to slam the Gulf Coast, and even ... more frequent. , How we handle them will be the ... Storm Prediction and Global Climate Impact in the Gulf Coast ... Storm Prediction, Education and Evacuation from Disaster Center, primary sponsor ...
... Computational Neurobiology Laboratory at the Salk Institute has been ... announced. Election to the IOM is considered one of ... medicine and recognizes individuals who have demonstrated outstanding professional ... "It is a great pleasure to welcome these distinguished ...
Cached Biology News:Penn State receives new NASA astrobiology grant 2Penn State receives new NASA astrobiology grant 3Weather woes emphasize need for SSPEED 2Salk researcher Terry Sejnowski elected to Institute of Medicine 2
(Date:7/3/2015)... ... July 03, 2015 , ... The Alexander Group, a 30-year ... industries alike-- typically known for its consummate professionalism-- embarks each year in a ... break from their day jobs. , "Our motto has always been work hard ...
(Date:7/3/2015)... 2015 Forskare kan ... på  http://www.openinnovationinscience.at till det återkommande utbildningsprogrammet ... hålls i Wien .  ... internationella forskare och vetenskapsmän som genomfördes av ... största utmaningar bristen på incitament för att ...
(Date:7/3/2015)...  Pomerantz LLP announces that a class action lawsuit ... the "Company")(NYSE: PBYI ) and certain of its ... Court, Central District of California , ... class consisting of all persons or entities who purchased ... 2015 inclusive (the "Class Period").  This class action seeks ...
(Date:7/2/2015)... ... ... been used in countless labs for decades. In the past, people had to go ... this was a daunting and tiring process looking at endless data tables and charts. ... the complex catalog structure. , Now thanks to FireflySci, scientists are throwing away those old ...
Breaking Biology Technology:The Alexander Group Declares Their Independence with a Bit of Levity 2Lansering av världens första program för öppen innovation för att utbilda forskare 2Lansering av världens första program för öppen innovation för att utbilda forskare 3SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 2SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 3SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 4New Cuvette E-Commerce Website Launched by FireflySci 2
... treatment for the underlying process not just the ... Governor's Business Plan Contest on Tuesday, receiving a ... a University of Wisconsin-Madison spinoff, emerged as an early ... judges. Even before that, co-founder Jeff Johnson, the professor ...
... eleventh-annual and largest-ever Venture Forum was held two weeks ... 130 technology companies to an audience of several hundred ... be of particular interest to Midwest technology entrepreneurs as ... too. , ,The forum is organized by the Larta ...
... State Senator Ted Kanavas remains optimistic that his ... pass the legislature yet this year. , ... Representative Jeff Fitzgerald, R-Horicon, would require companies that ... notify those people when that data is obtained ...
Cached Biology Technology:Alzheimer's drug firm and more winners named in Wisconsin business-plan contest 2Alzheimer's drug firm and more winners named in Wisconsin business-plan contest 3Alzheimer's drug firm and more winners named in Wisconsin business-plan contest 4Midwest fares surprisingly well at Venture Forum in Los Angeles 2Midwest fares surprisingly well at Venture Forum in Los Angeles 3Midwest fares surprisingly well at Venture Forum in Los Angeles 4Kanavas thinks personal ID theft bill will pass this year 2
Human peripheral blood CD19+ B cells, For immunohistochemistry (IHC) Cell Chip with Human Peripheral Blood Monocytes, B Cells, NK Cells and Stem Cells...
Human peripheral blood basophils, For immunohistochemistry (IHC) Cell Chip with Human Peripheral Blood Granulocytes...
Umbilical cord blood CD4+ T cells, For immunohistochemistry (IHC) Cell Chip with Human Umbilical Cord Blood MNCs and T Cells...
... Isothermal Block is an anodized aluminum, solvent-resistant ... and to provide efficient thermal transfer to ... design of the HT96 Isothermal Block replaces ... product design allowing for compatibility with robotic ...
Biology Products: