HOME >> BIOLOGY >> NEWS
Male susceptibility to disease may play role in evolution of insect societies

A pair of scientists has proposed a new model for behavioral development among social insects, suggesting that a higher male susceptibility to disease has helped shape the evolution of the insects' behavior.

What might be called the "sick-male" theory has been proposed by animal behaviorists Sean O'Donnell of the University of Washington and Samuel Beshers of the University of Illinois at Urbana-Champaign, and appears in the current issue of Proceedings Biological Sciences, published by the Royal Society of London.

Among behaviors possibly affected are the division of labor between males and females and the relative social isolation experienced by males in many social insect colonies.

The researchers looked at Hymenoptera, an order of insects, including bees, ants and wasps, some of which have highly complicated societies and an unusual genetic makeup. These insects are called haplodiploids because males and females have a different number of sets of chromosomes. The females, like most animals, including humans, are diploid and have two sets of chromosomes, one from each parent. Hymenopteran males, however, hatch from unfertilized eggs and are haploids with just one set of chromosomes.

"Disease and infections are a very powerful and ongoing force in natural selection, and natural selection should favor individuals that possess forms of genes, or alleles, that make them more resistant to infection," said O'Donnell, a UW associate professor of psychology. "In some cases, an individual that has more than one form of a gene can ward off more parasites. In humans, for example, there are different forms of a blood gene that can help ward off malaria parasites. People with two different alleles for this gene are more resistant to malaria."

Because they are haploid, Hymenopteran males can't have alternate forms of any genes, or in other words, individual males have no genetic variability. This, O'Donnell and Beshers contend, puts males at
'"/>

Contact: Joel Schwarz
joels@u.washington.edu
206-543-2580
University of Washington
24-May-2004


Page: 1 2 3

Related biology news :

1. Gene clusters predict atherosclerosis severity, susceptibility
2. Study helps explain island populations susceptibility to exotic diseases
3. Protein may reduce susceptibility to autoimmune disease
4. Gene variants may increase susceptibility to type 2 diabetes
5. Gene differences may alter susceptibility to multiple sclerosis
6. Breast cancer susceptibility genes play role in DNA repair
7. Three genes linked to psoriasis susceptibility identified on chromosome 17
8. OHSU scientists uncover key protein for Fanconi anemia, cancer susceptibility
9. Gene that controls susceptibility to tuberculosis discovered
10. TSRI scientists show that rare genetic mutations increase susceptibility to sepsis
11. Alcohol abuse may increase susceptibility to HIV infection

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/3/2016)... February 4, 2016 --> --> ... 1,351.5 M (105.0), up 1,187% compared with fourth quarter of 2014. ... SEK 517.6 M (loss: 30.0). Earnings per share increased to ... SEK 537.4 M (neg: 74.7). , --> ... amounted to SEK 2,900.5 M (233.6), up 1,142% compared with 2014. ...
(Date:2/2/2016)... , Feb. 2, 2016 This ... the bioinformatic market by reviewing the recent advances ... tools that drive the field forward. Includes forecast ... Identify the challenges and opportunities that exist ... and software solution developers, as well as IT ...
(Date:2/1/2016)... Rising sales of consumer electronics ... intuitive gesture control market size ... consumer electronics coupled with new technological advancements to drive ... through 2020   --> ... advancements to drive global touchfree intuitive gesture control market ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... Calif. , Feb. 4, 2016  Sangamo BioSciences, ... genome editing, announced today that Edward Lanphier , ... update on the progress of Sangamo,s ZFP Therapeutic ® ... business strategy at 2:40 pm ET on Thursday, February ... Annual Global Healthcare Conference. The conference is being held ...
(Date:2/4/2016)... British Columbia and MENLO PARK, Calif. ... (OTCQX: DMPI) ("DelMar" and the "Company"), a biopharmaceutical company ... today announced that it will present at the 18 ... Monday, February 8, 2016 at 10:00 a.m. EST in ... Bacha , DelMar,s president and CEO, will provide an update ...
(Date:2/4/2016)... (PRWEB) , ... February 04, 2016 , ... ... (AI) and leading supplier of Semantic Graph Database technology has been recognized As ... Products ” by Corporate America Magazine. , “At Corporate America, it’s our priority ...
(Date:2/3/2016)... 2016  With the growing need for better ... underway, therapies such as monoclonal antibodies, recombinant protein ... of indications are in high demand. Conventionally expression ... and production of these therapeutics. However, due to ... costs, novel approaches and novel expression systems are ...
Breaking Biology Technology:
Cached News: