text-only page produced automatically by LIFT Text Transcoder Skip all navigation and go to page contentSkip top navigation and go to directorate navigationSkip top navigation and go to page navigation
National Science Foundation
News
design element
News
News From the Field
For the News Media
Special Reports
Research Overviews
NSF-Wide Investments
Speeches & Lectures
NSF Current Newsletter
Multimedia Gallery
News Archive
News by Research Area
Arctic & Antarctic
Astronomy & Space
Biology
Chemistry & Materials
Computing
Earth & Environment
Education
Engineering
Mathematics
Nanoscience
People & Society
Physics
 

Email this pagePrint this page
All Images


Press Release 10-053
Small But Mighty Female Lizards Control Genetic Destiny

Mothers win the genetic tug of war by producing more sons with larger fathers and more daughters with smaller fathers

Back to article | Note about images

Photo showing a hand holding a smaller female anole and a larger male anole.

The male of this species can be two to three times the mass of the female, but the female may be able to control fertilization by selectively using the sperm from different mates.

Credit: Joseph Mehling, Dartmouth College '69


Download the high-resolution JPG version of the image. (32 KB)

Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.

Photo showing a mating pair of brown anole lizards from the Bahamas.

A mating pair of brown anole lizards from the Bahamas. Males can be up to two to three times larger than females, reflecting an evolutionary history of sexual conflict over the genes for body size.

Credit: Robert Cox and Ryan Calsbeek, Dartmouth College


Download the high-resolution JPG version of the image. (793 KB)

Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.

Photo showing a female anole lizard in center with a large male on left and small male on right.

Female anole lizards (center) mate with multiple males and then produce more sons with sperm from large males (left) and more daughters with sperm from small males (right).

Credit: Robert Cox and Ryan Calsbeek, Dartmouth College


Download the high-resolution JPG version of the image. (610 KB)

Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.

Cover of the April 2, 2010 issue of the journal Science.

The researchers' findings appear in the April 2, 2010 issue of the journal Science.

Credit: Copyright AAAS 2010


Download the high-resolution JPG version of the image. (1.1 MB)

Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.



Email this pagePrint this page
Back to Top of page