Bio1100 class52, Chap

Chapter 13

Animations ESP Study Guide

Part 3: The Continuity of Life

How Genes Work

Review

Darwin's theory of selection results in of organisms to their environment in a process called .
Over time, microevolution may lead to : the formation of new species.
Evidence for evolution includes:
- The record links modern species to extinct ones through intermediate forms.
- The record includes homologous , comparative , and convergent .
- The record and molecular .
Microevolution can be modeled by the Rule: allele frequencies should not change assuming 5 ideal conditions.
At Hardy-Weinberg , the distribution of 2 p and q in a population can be modeled by two equations.
Real populations can change their allele frequencies and undergo .
Natural selection changes frequencies in 3 directions.
- selection reduces phenotypes.
- selection reduces phenotypes.
- selection reduces one phenotype from the population.
A species is a group of organisms that can with each other and produce offspring.
Reproductive can lead to , the formation of new species.
- barriers include isolation, isolation, isolation, isolation, isolation, and
- barriers may result in inviability or infertility.
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Aug 3, 2009 Print