Online Onion Root Tips

In order to examine cells in the tip of an onion root, a thin slice of the root is placed onto a microscope slide and stained so the chromosomes will be visible. Learn how to identify and draw four stages of mitosis using microscope slide images of onion root tips. This lab is part of a larger process called the cell cycle, which involves the growth and repair of cells.

This lesson was designed to accompany the Online Onion Root Tip Activity (Arizona--The Biology Project). Students classify diagrams of onion root tip cells into the correct phase of the cell cycle in an interactive and receive feedback in the form of hints for cells they classify incorrectly. Learn about the phases of the cell cycle in onion root cells by completing an online simulation and a lab survey.

Record the number, percent, and time of cells in each phase and answer analysis questions. Complete exercises II through IV of Lab 7 (pages Lab7-2 through Lab 7-5) in the .SG/LM. Fill out the answer sheets on pages Lab 7-6 through Lab 7-8 as you work the exercises.

Mail or e-mail Lab 7 cell classification sheet and the chart on time spent in each stage from the Onion Root Tip Activity. Answer sheets on pages Lab 7-6 to 7-8. An onion root tip is a rapidly growing part of the onion and thus many cells will be in different stages of mitosis.

The onion root tips can be prepared and squashed in a way that allows them to be flattened on a microscopic slide, so that the chromosomes of individual cells can be observed easily. Onion Root Tip [ Start Page | White Fish Page | Root Tip Page ] Click on the highlighted areas below to view cells in different phases. 5.

For each cell, indicate the phase it is in. This also includes interphase. Students analyze images of onion root tips and graph the stages of the cell cycle.

Learn how cells grow, divide and transport nutrients in this ELA/Science activity. In order to examine cells in the tip of an onion root, a thin slice of the root is placed onto a microscope slide and stained so the chromosomes will be visible. Cell Biology Intro to Onion Root Tips Activity Online Onion Root Tips Determining time spent in different phases of the cell cycle The assignment ...

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