Study Of Origin Of Species Enters The Molecular Age

Nothing brings two people closer together than sex, but for closely related species of fruit flies, it may be what keeps them apart. Researchers at the University of Chicago have recently discovered a gene that appears to play a crucial role in causing one species to split into two--and stay that way. The gene causes the male progeny of two recently separated species to be sterile--a condition known as hybrid male sterility.

"How speciation occurs is one of the central questions in evolutionary biology," says Chung-I Wu, Ph.D., chairman and professor of the department of ecology & evolution at the University of Chicago, and senior author of the paper in the November 20 issue of Science. "Geographic isolation and changes in the environment are only a part of what drives speciation. There are also changes at the genetic level that are driven by sexual selection. As a result, two newly formed species can't mix back into one."

Many species of insects and mammals exhibit male sterility in inter-species hybrids at the early stages of speciation. For example, the male progeny of the yak-cow cross are sterile. Male 'zonkeys,' the offspring of a zebra and a donkey, are also sterile. Wu speculated that hybrid male sterility must be an early indicator of speciation.

Chau-Ti Ting, a postdoctoral fellow in Wu's lab pinpointed a gene (there may be many) involved in producing sterility in hybrid males. It does this by evolving so rapidly that male offspring produced by two newly divergent or 'sibling' species are so different from their parents that they are unable to make sperm.

The gene Ting thinks contributes to hybrid male sterility is a homeobox gene. Homeobox genes, usually involved in development and cell differentiation, are some of the slowest evolving genes in all of nature. This means that they are almost identical in organisms as diverse as worms and monkeys. But when Wu looked at a certain homeobox gene in

Contact: Sharon Parmet
University of Chicago

Page: 1 2

Related biology news :

1. Study: Emission of smog ingredients from trees is increasing rapidly
2. Study explores gene transfer to modify underlying course of Alzheimers disease
3. Study reveals why eyes in some paintings seem to follow viewers
4. Study by Israeli scientists provides insight on DNA code
5. Study reveals first genetic step necessary for prostate cancer growth
6. Study of flu patients reveals virus outsmarting key drug
7. Study in Science reveals recreational fishing takes big bite of ocean catch
8. Study suggests cell-cycle triggers might be cancer drug targets
9. Study narrows search for genes placing men at increased risk for prostate cancer
10. Study links high carbohydrate diet to increased breast cancer risk
11. Study explains spatial orientation differences between sexes

Post Your Comments:

(Date:8/26/2020)... ... August 25, 2020 , ... ... targeting mitochondria, in partnership with Essex Bio-Technology, a bio-pharmaceutical company specializing in ... 3 VISTA-2 study of SkQ1 ophthalmic solution in patients with moderate to ...
(Date:8/23/2020)... , ... August 21, 2020 , ... ... Corporation has been published and is now available on the company’s global ... diffraction—serves the X-ray analysis community, presenting current news and crystallographic research. , ...
(Date:8/21/2020)... ... August 19, 2020 , ... ... conference and expo uniting life science, data science, informatics and IT leaders goes ... “In this period of uncertainty and change, Bio-IT takes the leadership role of ...
Breaking Biology News(10 mins):
(Date:7/22/2020)... ... July 22, 2020 , ... Join experts from Reed ... Manager Regulatory Solutions, in a one hour live webinar on Thursday, August ... in China for drugs and medical devices. Specifically, for medical devices, the NMPA has ...
(Date:7/18/2020)... ... ... “We are thrilled to deliver this new technology to the industry” said Matt ... the market and we were pleased that the IFT jury recognized that.” reFRESH™ couples ... a natural way to extend the shelf life and improve the safety of perishable ...
(Date:7/18/2020)... TORONTO (PRWEB) , ... July 17, 2020 , ... ... and global consulting firm for the life sciences and food industries, is pleased ... new Director of Clinical Research – Business Development. , Charles is an accomplished ...
(Date:7/10/2020)... ... July 09, 2020 , ... PathSensors Inc., ... has expanded the company’s exclusive license to include clinical applications for CANARY™ ... market, focusing initially on the SARS-CoV-2 biosensor. CANARY’s™ fast and highly ...
Breaking Biology Technology:
Cached News: