Mitosis Hands-OnLabs,Inc. Version42-0091-00-01 Lab Report Assistant

Mitosis

Hands-OnLabs,Inc. Version42-0091-00-01

Lab Report Assistant Thisdocumentisnotmeanttobeasubstitute foraformallaboratoryreport.TheLabReport Assistantissimplyasummaryoftheexperiment’squestions,diagramsifneeded,anddatatables that shouldbeaddressedinaformallabreport. Theintentistofacilitatestudents’writing oflab reports by providing this informationin an editable filewhich can be sent to an instructor.

MitosisWorksheet-Answer the questionsabout the photos below:

Onion root tipphotos at 600x and 1000x taken by Stan Carpenter of Hands-On Labs, Inc.

1. What phase is this cell undergoing?

2. What happens afterthis phase?

1. The two center side-by-side cells are undergoingtwodifferent phasesof mitosis.

a. What are these phases?

b. Whatdiagnosticfeaturescanhelp you with your decision?

1. What phase is this cell undergoing?

2. How can you tell?

1. This cell has clearly visible chromatids.

a. What'sthenextphasethiscellwill undergo?

b. Wherewillthechromatidsgointhe coming phase?

1. Thecellinthelowercenterisexhibiting signs of what phase of mitosis?

2. Whatphasedoesitappearthecellaboveis undergoing?

1. Explainwhathappens duringanaphase.

2. When thechromatidsseparate,whatis each called?

Questions

A. What is the purpose of mitosis?

B. Why is the cell cycle important for organisms?

C. What role does mitosis play in the growth of an embryo?

D. What is one main differencein the mitoticprocesses between plant and animal cells?

E. Ifthecellthathasundergonemitosisoriginallyhadthediploid (2n)numberofchromosomes, then what number of chromosomes will the nuclei in the two new cells have?

F. Can mitosis ever be used for reproduction?

G. What parts of plants are most impacted by mitosis?

H. Why might mitosis be easier to study in the tipof the root?

I. Where else in a plant might you finda large amount of mitoticcell division occurring? J. How might the mitoticindex be applied in agriculture?

K. Whatdidyoucomputetobethemitoticindexofthecombinedsixslides(assumethereare

54totalcells)?Incomparison totheindexesreflectedinFigure8,fromapproximatelywhicharea

of a root was the sample taken?