Asexual Cell division
Materials : Microscope, hyacinth’s root slides
1- Activity 1 : Observe different stages of mitosis
Use the microscope to observe different stages of mitosis in a root of hyacinth. Draw a stage and caption your drawing.
2- Activity 2 : Where are the stages ?
Locate the four mitotic stages and comment each of them.
3- Activity 3 : Label diagrams
Label these mitosis diagrams.
Basic vocabulary
1. DNA – deoxyribonucleicacid;theuniquegeneticcode for everylivingthing
2. INTERPHASE – astagebefore mitosisduringwhichexact
copiesofchromosomesaremade
3. CENTROMERE – asinglepointwheretwochromatids areheldtogether
4. CHROMOSOMES – strands ofgeneticcodesmadeup
ofDNAmolecules
5. SOMATIC – anycellthatisnotareproductivecell
6. HAPLOID – inhumans,atypeofcellthatcontainsa
totalof23chromosomes,halfof whatadiploidcellhas
7. CHROMATIDS – twoidentical parts of chromosomesthatsplitand containthesamegeneticmaterial
8. MITOSIS – divisionofsomaticcellstocreatenewcells
9. DIPLOID – atypeofcellthatcontains23pairsoratotalof46chromosomes
10. EUKARYOTIC – cellsthathaveaclear,distinctnucleus
11. CENTRIOLES – twosmallpartsinanimalcellsthatdirectthemovementof chromosomesduringmitosis
12. POLES – oppositeendsofacell
13. CYTOKINESIS – whenacell’s cytoplasmdividesandcutsthecellinhalfandthe resultistwocellsinplaceofone
14. ANAPHASE – third stageofmitosis;spindlefiberspullchromatidstoopposite
poles
15. DUPLICATE – tomakeanexactcopyof
16. NUCLEAR MEMBRANE – envelopearoundnucleus ofacell
17. PROPHASE – first stageofmitosis;chromosomesbecomevisibleandcentrioles movetowardspoles
18. ALIGN – tolineup
19. METAPHASE – secondstageofmitosis;nuclear membranedissolvesand chromatidsalignincenterofcell
20. TELOPHASE – fourth stageofmitosis;chromosomesatoppositepoles,spindle
fibersbreakdown,andanuclear envelopeformsaroundbothsetsof chromosomes
21. Microtubule – Microscopic tubular structures which are involved in organizing the spindle during nuclear division.
22. MITOTIC SPINDLE –The collective term for all the spindle fibers that form during mitosis.
4- Activity 4 : How the mitotic spindle work ?
Watch the video and answer the following quiz to test your knowledge
