Students will study the cellular steps involved in DNA replication and cell division in both mitosis and meiosis. This investigation will allow students to examine the stages of mitosis in the preparation of plant root tips. Crossing over in meiosis will also be investigated through the use of Sordaria cultures. Meets AP Science Practices 1, 5, 6, and 7, and Big Idea 3. Materials provided for 32 students in eight lab groups. Kit Includes: 10 Disposable scalpels, sterile 20 Petri Dishes, Sterile 200mL Sordaria Agar 200mL Sordaria Mating Agar 8 Disposable Inoculating Loops, Sterile 8 Forceps 1 pkg Microscope Slides 1 pkg Coverslips 16 Plastic Pipettes 8 Plastic Cups 500g Sand 30mL Hydrochloric Acid, 6.0M 30mL Toluidine Blue, 1% Coupon redeemable for: Sordaria, wild type Sordaria, tan mutant Materials Needed but not Supplied: Microscopes Distilled Water Microwave or Hot Waterbath Garlic Cloves Optional: Lectin pH Buffers NaCl Plant Hormones (e.g. indole acetic acid, kinetin) Herbicides Any other materials students may think might affect the rate of mitosis in garlic root tips DOT Info: Small quantity exemption 173.4 THIS PACKAGE CONFORMS TO 49 CFR 173.4 for domestic highway or rail transport only WARNING: This product can expose you to chemicals including Respirable crystalline silica, which are known to the State of California to cause cancer. For more information go to http://www.P65Warnings.ca.gov.