Name: ______________________________________________
Period: __________
Date: _______________________
2/4/22
3
Gina Rampersaud
Mitosis vs. Meiosis
two chromosomes in a pair one from the
1. Define homologous chromosome. __________________________
mother and one from the father
______________________________________________________
identical copies (chromatids) formed by the DNA
2. Define sister chromatids. _________________________________
replication of a chromosome,
______________________________________________________
3. Describe 2 parts of meiosis that are similar to mitosis.
a. ________________________________________________
DNA Replecation
________________________________________________
nuclear membrane
b. ________________________________________________
degradation
________________________________________________
4. Identify whether each process below occurs during mitosis, meiosis, or both.
both
a. Sister chromatids separate __________________________
b. Haploid cells are formed meiosis
___________________________
mitosis
c. Cell division occurs once ___________________________
meiosis
d. Homologous chromosomes pair _____________________
meiosis
e. 4 haploid cells are the final result ____________________
f.
Crossing over occurs ______________________________
meiosis
g. Cell division occurs twice __________________________
mitosis
mitosis
h. Replicated chromosomes line up in the middle of the cell __________________________
i.
mitosis
2 diploid cells are the final result _____________________________________________
the swapping of genetic material that occurs in the germ line
5. Define crossing over. ____________________________________________________________________________
______________________________________________________________________________________________
prophase
What phase does it occur? ________________________________________________________________________
dipolid
6. Does the parent cell in Mitosis start off as diploid or haploid? ______________________
Are the resulting cells at
the end of Mitosis diploid or haploid? ___________________________
diploid
7. Does the parent cell in Meiosis start off as diploid or haploid? _____________________
Are the resulting cells at
diploid
the end of Meiosis diploid or haploid? ____________________________
haploid
8. How does the number of chromosomes in a sex cell compare with the number of chromosomes in the parent cell? __
Its half the number of chromosomes. In meiosis homologous chromosomes line up in pairs.
______________________________________________________________________________________________
9. Describe the differences in how the chromosomes line up in middle of the cell during Metaphase I of Meiosis and
the chromosme just line up in the middle while in Meiosis they line up in their homologous pairs in
Metaphase of Mitosis. Mitosis
__________________________________________________________________________
the middle
______________________________________________________________________________________________
A
telephase
10. Identify the phase in the cell to the left. _____________________________
What is the
name of Structure A? ____________________________________
parent cell
cykonesis
11. Identify the phase in the cells to the left. _______________________
What is happening
to the nuclear envelope? ___________________________________________________
it is splitting
apart
because the
_________________________________ Why does this happen? _________________
nuclear envelope breaks down, resulting in the release of most of the contents of the nucleus into the
_______________________________________________________________________
cytoplasm.
anaphase
12. Identify the phase in the cell to the left. _________________________
What is being
separated? ___________________________________________________
each pair of chromosomes is separated into two identical, independent chromosomes.
This diagram is a general
overview of what occurs
during Mitosis and
Meiosis, but the specific
phases have not been
labeled for you!!!
Honor’s Biology Only
mitosis produces two daughter cells identical to the parent
13. Explain why mitosis is referred to as a process of cell replication. _________________________________________
cell; so the number of chromosomes in the parent and
______________________________________________________________________________________________
daughter cells must be the same. Mitosis produces two
______________________________________________________________________________________________
diploid cells from one diploid cell.
because it reduces the number of chromosomes to half the
14. Explain why meiosis is referred to as a process of cell reduction. __________________________________________
normal number so that there would be a correct number of
______________________________________________________________________________________________
chromosomes.
______________________________________________________________________________________________