Mitosis, Meiosis, Karyotypes Review
Define the following terms:
homologous chromosome –
gene gamete –
tetrad –
crossing over –
centrioles –
spindle fibers –
centromeres –
haploid –
diploid –
Read each statement, then write down the correct state of interphase, meiosis (specific phase) or cytokinesis
that the statement describes.
1. _____________________ homologous chromosomes line up in the center of the cell
2. _____________________ the sister chromatids separate into individual chromosomes and
move apart
3. _____________________ 4 (N) haploid daughter cells form
4. _____________________ the haploid number of chromosomes line up in the center of the cell
5. _____________________ cells undergo DNA replication
6. _____________________ nuclear membrane forms around 4 haploid nuclei
7. _____________________ 2 (N) haploid daughter cells form
8. _____________________ the nuclear membrane breaks down
9. _____________________ the nuclear membrane reforms creating two cells each with 2 nuclei
10. _____________________ crossing over (if any) occurs
11. _____________________nuclear membrane forms around pairs of sister chromatids
12. _____________________ spindle fibers pull homologous pairs to opposite ends of the cell
Fill in the Blanks – use the words from the word bank to fill in the banks. Words may be used more than once!
nuclear
diploid
nuclei
cell
two
haploid
four
Meiosis I is _____________________ division which produces two ______________________. Cytokinesis
between Meiosis I and Meiosis II forms _______________ cells each with a __________________ number of
chromosomes. Meiosis II is ______________________ division which produces _______________ nuclei in
_____________________ cells for a total of __________________ nuclei. Cytokinesis after Meiosis II forms
_____________________ cells each containing a _____________________ number of chromosomes.
Compare and Contrast – Describe a similarity and a difference between meiosis I and meiosis II
_____________________________________________________________________________________________
_____________________________________________________________________________________________
_____________________________________________________________________
Identify each phase of Meiosis
___________________
____________________
_________________ __________________
___________________
____________________
_________________ __________________
1. Copies of chromosomes are held together by the _____________________________
2. In meiosis each chromosome pairs with its __________________________________
3. Draw "crossing over" - using your pencil to shade in the areas that exchange parts.
4. During meiosis 2, chromosomes line up again along the cell's _______________________________
5. Only _______ copy of each chromosome moves toward the poles. Which means only _________
chromosomes of the original 46.
6. What happens in prophase 1?
7. At the end of meiosis 1, each cell divides, forming a total of _________________________ cells.
8. DNA replication takes place when? __________________________________________________
9. Meiosis consists of two cell divisions: ______________________ & _______________________
10. What happens in metaphase I _______________________________________________________
11. What happens during anaphase I _____________________________________________________
12. In prophase II, each cells is [ diploid / haploid ] (circle)
13. What happens during telophase II? ___________________________________________________
14. Each of the four daughter cells produced by meiosis are [identical / unique ]
15. With respect to meiosis, when does DNA replication occur? _______________________________
16. When does crossing over occur? _____________________________________________________
17. During which phase of meiosis do homologous chromosomes line up along the equator?
Complete the table below for the chromosome numbers of various species.
Mark an ‘X’ in the box indicating which process is being described:
Meiosis
1. Two cell divisions
2. Occurs in gametes
3. Half the original chromosomes
4. Homologous Chromosomes Pair up
5. Creates identical cells
6. Four daughter cells
7. Same #of chromosomes at end
Mitosis
Use the diagram to the left to answer the following questions:
1) What is this diagram called?
2) What are 4 things you can learn from these
diagrams?
3) What are three features that you can use to
compare chromosomes?
4) What is the gender of this individual?
5) How many chromosomes are found of in the
skin cells of this individual?
6) How many chromosomes are found in the sex
cells of this individual?
7) How man homologous pairs are there?
8) Is this individual a human? How do you
know?