Notes for Understanding Evolution - Chapters 10 and 11

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General guide on these review questions here

Notes for Chapter 11: Cataclysmic Evolution

Introduction

Key Terms: polyploidy

I. Wheat

RQUE11.1: Why does commercially grown bread wheat have greater numbers of chromosomes than its closest wild plant relatives?

II. Origin of Wheat Species

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Featured Organisms: Wheat and its relatives (Triticum spp., wild grass Aegilops spp.)
Links: 1 - 2 - 3 - 4 - 5 - 6 - 7

III. Mechanism of Speciation by Polyploidy

Key Terms: haploid vs. diploid vs. tetraploid vs. hexaploid (polyploid)

RQUE11.2: What errors in meiosis most likely could account for the polyploid nature of wheat?

IV. Experimental Verification

RQUE11.3: How was bread wheat first convincingly shown to be a hexaploid species?

V. Cotton and Continental Drift

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Featured Scientist: Alfred Wegener
Links: 1 - 2 - 3 - 4 - 5 - 6

RQUE11.4: How is the current distribution of cotton thought to be related to Alfred Wegener's notion of continental drift?

Click link to return to Biology 409 Schedule
or back to Chapter 10 or ahead to Chapter 12

This page created 8/16/01 © D.J. Eernisse, Last Modified 6/8/02, Links Last Completely Checked 6/12/02