HOME >> BIOLOGY >> NEWS
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
sparmet@mcis.bsd.uchicago.edu
773-702-6241
University of Chicago
20-Nov-1998


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:
*Name:
*Comment:
*Email:


(Date:6/11/2019)... WEST LAFAYETTE, Ind. (PRWEB) , ... June 10, 2019 , ... ... Synchrotron Methods” in the July 2019 issue of AAPS PharmSciTech. The article was published ... A. Smith of Improved Pharma, along with Xiaoming Sean Chen of Purdue University. ...
(Date:6/4/2019)... ... June 04, 2019 , ... ... orthopedic medical devices, today announced Q1-19 revenues of $31M, up 12% from Q1-18. ... successful roll-out of strategic investments & operational excellence initiatives worldwide. , Laurent ...
(Date:6/4/2019)... ... 2019 , ... Lajollacooks4u is delighted to announce it has been named as ... is given only to businesses that have achieved consistently outstanding traveler reviews on TripAdvisor, ... , To qualify for the Certificate of Excellence –- an award that only 10 ...
Breaking Biology News(10 mins):
(Date:6/11/2019)... (PRWEB) , ... June 11, 2019 , ... ... of Personalized Stem Cells Inc. (PSC) , has announced that their GMP ... Health, Food and Drug Branch for manufacturing. This is an important milestone ...
(Date:6/6/2019)... ... June 05, 2019 , ... WCCT Global, Inc ., a full-service ... today that they will be receiving 3 awards at the 2019 CRO Leadership Awards, ... awards in the categories of overall Quality and Compatibility (Access to desired markets, cultural ...
(Date:5/31/2019)... Redwood City, California (PRWEB) , ... ... ... received allowance of our patent applications from the USPTO providing proprietary interest ... SYSTEM AND METHOD FOR SLEEP DISORDER DIAGNOSIS AND TREATMENT… extends Somnology’s IP ...
(Date:5/31/2019)... NEWPORT BEACH, Calif. (PRWEB) , ... May 30, ... ... the future of neurotoxins, is pleased to announce the strategic acquisition of Metabiologics, ... for research. The acquisition provides Object exclusive ownership and commercialization rights to a ...
Breaking Biology Technology:
Cached News: