Interphase Prophase Metaphase Anaphase
Remember to know your group leader!
Today we went straight to the lab. The lab was looking at a onion root under the microscope and answering some questions. In this lab, the point is to look at the chromosome arangements and trying to see the different stages of cell divisio0n. Here are the questions and their answers:
1. You are looking at the cross sectional of the tip of an onion root. Why might you expect an onion root tip have cells that are dividing?
The cells might divide so that the root can dig deeper and hold the onion in the ground. So really it is for growth.
2.Find and look at all three of the slices breifly. What are the dyed objects inside of the cell?
The dyed objects in the cell are the nuclei.
3. Is there evidence of cellular division? Explain.
Yes, some nuclei are darker than the others because the cell is going through mitosis. They are darker because the chromosomes are beginning, and are, visible.
4. Draw at least 4 different cells at what you'd call "different stages." Only draw ONE cell in each box and label the stage.
See Above
5. Explain why you believe the cell is in each stage.
Interphase: We think this one is in interphase because the necleus cannot be seen and during the interphase the nucleus cannot be seen.
Pro phase: We think this one is in prophase because the chromosomes can be seen.
Metaphase: We think this one is in metaphase because the chromosomes are lined up the middle.
Anaphase: We think this one is in Anaphase because the Dna is on either side fo the cell.
There's the lab! If you didn't finish it in class, yopu have to finish it for homework.
Mark V. 4th time
Hey,
ReplyDeleteI messed up on the top picture and couldn't remove it so remember for the last two, the dots should be for 3, along the center of the CELL, and 4 , along the sides of the CELL.
Mark V.