EEB 122: Principles of Evolution, Ecology and Behavior

Lecture 12 - Sex Allocation << previous session | next session >>

Overview:

Sex allocation is an organism's decision on how much of its reproductive investment should be distributed to male and female functions and/or offspring. Under most conditions, the optimal ratio is 50:50, but that can change under certain circumstances. Sex allocation determines what sexes sequential hermaphrodites should be at each part of their life as well as how simultaneous hermaphrodites should behave. Some species have more control over the sexes of their offspring than others, and adjust the sex ratios of their offspring depending on the environment and conditions.

Reading assignment:

Stearns, Stephen C. and Rolf Hoekstra. Evolution: An Introduction, chapter 10

Class lecture:

Transcript
html
Audio
mp3
Video
medium bandwidth
low bandwidth
high bandwidth

Yale University 2009. Some rights reserved. Unless otherwise indicated on this page or on the Open Yale Courses website, all content on this page is licensed under a Creative Commons License (Attribution-NonCommercial-ShareAlike 3.0)