Copy the following paragraph and fill in the missing blanks. Some of the words will not be
used.
chromatids
crossing-over
DNA recombination
half homologous
meiosis
mitosis
sex
twice
variability
For eukaryotic organisms to mate through sexual reproduction, MEIOSIS
occurs in their
1
2 cells. This process is similar to mitosis, but it has some differences such as it
gametes or SEX
goes through the cell division stages twice and produces cells with HALF
3 the number of
chromosomes. The chromosomes might overlap and swap DNA fragments when they are
4
pulled apart during Prophase I; this process is called CROSSING-OVER
and it leads to more
5
genetic VARIABILITY
among the offspring.
Unit 4 – Cell Cycle
Definitions Due Friday (11/6/15)
All Parts Due Friday (11/13/15)
Period 6 – All Parts Due Thursday (11/12/15)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Allele
Anaphase
Cancer
Cell Cycle
Centriole
Centromere
Chromatid
Chromosome
Crossing Over
Cytokinesis
Daughter Cell
12. Diploid
13. Electrophoresis
14. Frameshift
Mutation
15. Gamete
16. Gene
17. Genetic Disorder
18. Genome
19. Haploid
20. Interphase
21. Karyotype
22. Meiosis
23.
24.
25.
26.
27.
28.
29.
Pg 54
Metaphase
Mitosis
Mutation
Offspring
Point Mutation
Prophase
Sexual
Reproduction
30. Somatic
31. Telophase
32. Tumor
Collect Today
Page 59 – Cell Cycle Concept Map Corrections
Notecard Sticker Sheet
Assigned
Vocabulary Quiz – TOMORROW!!!
Page 61 - Mitosis vs Meiosis
Notecard ALL PARTS (Friday)
Cell Cycle/Vocabulary Make-Up Quiz (Friday)
Most Missed Quiz Make-Up (Friday)
Late
Page 58 – Cell Cycle Foldable (-50%)
Page 60 – Cancer Webquest (-30%)
Organize Buff
Binder – Buff
Binder Quiz
sometime this
week.
Essential Question
Pg 61
How does meiosis differ
from mitosis?
Standard
B.6G – Recognize the significance of meiosis in sexual
reproduction
A cell that contains both sets of homologous
chromosomes is said to be diploid.
Diploid means “two sets”.
2N is used to represent the number of chromosomes
in a diploid cell.
The gametes contain only a single set of chromosomes
and are said to be haploid.
Haploid means “one set”.
N is used to represent the # of chromosomes in a
haploid cell.
Meiosis is a process in which
the number of chromosomes
per cell is cut in half through
the separation of homologous
chromosomes in a diploid cell.
** Meiosis is how gametes are
produced**
Meiosis usually involves two divisions called meiosis 1
and meiosis 2.
By the end of meiosis, the diploid cell that entered
meiosis has become four haploid cells.
During Prophase I of meiosis, chromosomes line up to form
homologous pairs.
When crossing over occurs genetic material is exchanged
between maternal and paternal chromosomes.
Crossing over results in genetic variation.
Mom’s
chromosome
Dad’s
chromosome
Label the diagram
Crossing over
Result = genetic variation
In male animals, the haploid gametes produced by
meiosis are called sperm.
In female animals, the haploid gametes produced by
meiosis are called eggs.
MEIOSIS
Crossing
Over
Mom’s
chromosome
DNA
Replication
Dad’s
chromosome
Crossing
Over
Mom’s
chromosome
MITOSIS
Identical Copy
Dad’s
chromosome
Identical Copy
Mitosis results in two genetically identical diploid cells.
Mitosis is used for growth and repair.
Mitosis is used for somatic (body cell) production.
Meiosis results in four genetically different haploid cells.
Meiosis is used for gamete production and increased genetic variation.
Mitosis is used for growth and repair.
Meiosis is used for gamete production
and increased genetic variation.
Mitosis
Meiosis
Compare and Contrast Mitosis vs
Meiosis by copying the diagram and
filling it in.
Both
Mitosis
Mitosis
Meiosis
Meiosis