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Mendel Dreams

The Beginning of Genetics


Author(s)

Clyde Freeman Herreid
Department of Biological Sciences
University at Buffalo
herreid@buffalo.edu
Paula P. Lemons
Division of Biological Sciences
University of Georgia
plemons@uga.edu

Abstract

In this PowerPoint-based clicker case, developed for use in either a general biology or general genetics class, students are introduced to the life and work of Gregor Mendel.  The initial slides set up the story as we see Mendel, who is ill, reminiscing about his pea plant experiments.  As the storyline unfolds, students are placed in a position where they have to think their way through some data the way that Mendel presumably had to do himself. The case covers the highlights of early genetics including monohybrid and dihybrid crosses, and discusses the downfall of the blending hypothesis.


Objectives

  • Describe some of the history of Mendel's work on patterns of inheritance.
  • Explain the blending hypothesis.
  • Explain the law of the segregation of alleles.
  • Explain the law of independent assortment.
  • Set up a Punnett square correctly.
  • Draw conclusions about inheritance from genetic cross data.
  • Predict outcomes from genetic cross experiments.
  • Design genetic cross experiments to answer questions about inheritance and analyze genetic cross experiments to improve them.

Keywords

Heredity; inheritance; monohybrid; dihybrid; dominant; recessive; phenotype; genotype; alleles; homozygous; heterozygous; Punnett square; particle theory of inheritance; law of segregation; law of independent assortment; experimental design

Topical Areas

History of science, Scientific method

Educational Level

Undergraduate lower division

Format

PDF, PowerPoint

Type / Methods

Clicker, Interrupted

Language

English

Subject Headings

Biology (General)  |   Genetics / Heredity  |   Botany / Plant Science  |  


Date Posted

8/14/2012

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