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Mendel Dreams

The Beginning of Genetics

By Clyde Freeman Herreid, Paula P. Lemons

Mendel Dreams


 

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.

   

Date Posted

08/14/2012

Overview

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

  

Subject Headings

Biology (General)
Botany / Plant Science
Genetics / Heredity

EDUCATIONAL LEVEL

Undergraduate lower division

  

FORMAT

PDF, PowerPoint

   

TOPICAL AREAS

History of science, Scientific method

   

LANGUAGE

English

   

TYPE/METHODS

Clicker, Interrupted

 

 

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