Name ___________________________________________________ Date ________________
ONION ROOT TIP ONLINE ACTIVITY
1. Visit http://www.biology.arizona.edu/cell_bio/activities/cell_cycle/cell_cycle.html
2. Draw the sketch of an onion root tip in the field of view below.
a. Be sure to label the following cell parts on at least one cell
i. Nucleus
ii. Chromosomes
iii. Fibers
iv. Cell wall
b. Be sure to label at least one cell in each phase of its
life cycle:
i. Prophase
ii. Metaphase
iii. Anaphase
iv. Telophase
v. Interphase
3. Click Vocabulary, then Terms to Know about Mitosis and define the following terms:
Chromatid: ____________________________________________
Chromatin: _______________________________________________________
Chromosomes: _____________________________________________________
X out the Vocabulary window and click Next
a. Describe what happens in INTERPHASE:
Nucleus (observe picture)
Chromosomes (DNA)
b. Describe what happens in PROPHASE:
Nucleus (observe picture)
Chromosomes
Chromatin
Nuclear Membrane
c. Describe what happens in METAPHASE:
Nucleus (observe picture)
Chromosomes
Fibers
d. Describe what happens in ANAPHASE:
Chromosomes
e. Describe what happens in TELOPHASE:
Chromosomes
Nuclear Membrane
4. Click ‘Next’. You will not have to copy the chart on the webpage, use the one below.
5. Click ‘next’. You will be shown 36 different cells, each in a different phase of its life cycle.
Click on the phase that is best represented by the sketch. Record your response in the chart.
6. Repeat for all 36 cells. Be sure to ‘record’ the number of cells observed in each sketch.
a. If you are incorrect, read the ‘clues’ that will help you better determine the correct
phase
7.
Use a calculator and determine the number/percentage of cells in each phase.
Interphase
Prophase
Metaphase
Anaphase
Telophase
Total
number of cells
36
percent of cells
100%
Go to http://www.biology.arizona.edu/CELL_BIO/tutorials/cell_cycle/problems.html . Answer all 11
problems and write down the correct answer in a FULL sentence that references the question.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.