CONTENTS

Microscopes
Who Was Anton Leeuwenhoek?	Students are introduced to Internet research, saving information to disk, and using Internet resources.
A Letter from Leeuwenhoek	Students analyze the historical changes in microscope technology
Robert Hooke	This is a replication of Hooke's investigation.
What Shape Are Cells?	Slide show of one-celled organisms and body cells.
Cell Discovery Timeline	Major events leading to the invention of the microscope and discovery of cells, cell parts, and cell processes.
Cell Structure
Parts of a Cell	A look at the contents of a cell.
Parts of a Cell-Definitions	The definitions used in this interactive lesson go beyond "the mitochondria is the powerhouse of the cell"..
Organelles Aren't Just Circles and Blobs!	Two images are available: a labeled diagram and a micrograph of the organelle. The activity does not work in Netscape.
Cell Play	Students perform a play which includes descriptions and functions of organelles.
3-D Cell Model	A cell is constructed of common materials. Student write description and function of organelles.
Cell Mural	A two dimensional model is made including all organelles.
Cell Membrane	Molecules called phospholipids make up the basic structure of the cell membrane. Students build a paper model of the membrane layers.
Cell Database	Students research each cell organelle and enter the information in a database.
Plant Cell Lab	Size in microns is calculated .
Plant Cell Lab - Onion Cells	Onion cells are examined; organelles are identified and measured.
Plant Cell Lab - Elodea	Elodea Cells are examined; structures identified and measured.
Cell Processes
Diffusion and Osmosis	Students investigate the permeability of various cell wall models.
Cell Membrane Model	A plastic bag and jelly beans is used to simulate the movement of molecules into a cell.
Mitosis Model
Stages of Mitosis	The stages are described, students match the description to the correct stage image.
Mitosis Is For Chromosomes	The stages are described in terms of the chromosomal changes. A brief description of what happens to the chromosomes during each stage is listed.
Meiosis Chart and Model	Stages are compared to mitosis; students construct models of each stage.
Karyotypes	A model of chromosomes is used; students pair each of the chromosomes and determine whether the organism is male or female based on their pairings.
Punnet Squares	This exercise provides practice in calculating probability of geno- and phenotypes with one and two chromosomes.
DNA
Introduction	The student is introduced to the materials that will be used for simulating DNA strands.
DNA Model	Students use beads to build a simulated model of a gene.
DNA Replication	Beads are used to simulate the replication of a DNA strand.
What Are Chromosomes?	This lesson describes chromosomes and relates genes to the DNA model of the previous three activities.
Genetics
The Genetic Code	A sequence of symbols is used to model DNA. Students determine the Pattern, or code.
Whose Eyes?	Common inherited traits are identified. Students determine whether or not they have the dominant or recessive trait.
Ninsect Activity	Students use a hypothetical organism to determine the geno- and phenotypes of several generations.
Have You Found Your Long Lost Twin?	Phenotypes are observed and plotted on a genetic wheel.
Did Mother Nature Give You a Fair Shake?	Dice are you used to model probability of inheriting a certain trait.