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WARM-UP#7
1. What type of cell division is the diagram
above?
2. What phase of cell division the arrow
pointing to?
REMEMBER THE…
Characteristics of
living things

Living things are made up
of cells

Unicellular – one celled
organisms

Multicellular – many
celled organisms
Characteristics of living things

Living things
reproduce to make
offspring of the same
species
Asexual reproduction
Sexual reproduction
Characteristics of living things

Living things grow and develop
MEIOSIS
PROCESS OF REDUCTION DIVISION
(CHOROMOSOME # IS CUT IN ½ BY SEPERATION OF
HOMOLOGOUS CHROMOSOMES IN DIPLOID CELLS)
2. Chromosome number in
body cells vs. gametes?

Body Cells:
Diploid (2N) - have 2 sets

Gametes:
Haploid (N) - have 1 set
3. Summarize the events of
meiosis. (See also #5)
3. Summarize the events of
meiosis. (See also #5)
4. What are the results of
meiosis?

4 haploid (N) cells

Genetically
different from
each other & the
original cell
6.
Differences between Mitosis & Meiosis?

MITOSIS produces 2 identical diploid (2N) cells

MEIOSIS produces 4 different haploid (N) cells
7. Human cells 2N=46.
How many chromosomes are in a…?

Sperm Cell?
23 chromosomes
 Gamete is haploid (N)


Egg Cell?
23 chromosomes
 Gamete is haploid (N)


White Blood Cell?
46 chromosomes
 Body cell is diploid (2N)

8. How does independent assortment
apply to chromosomes?

The “chromosomes”
assort independently,
not individual “genes”
9. Crossing-over & gene mapping?
Farther apart 2
genes are, more
likely they’ll be
separated
 Frequency of
crossing-over = to
distance between 2
genes

library.thinkquest.org/ 19037/genome3.html
10. How close are 2 usually
independently assorted genes?
 Very
far apart from each other.
biology.clc.uc.edu/
courses/bio104/meiomito.htm
MEIOSIS FOLDABLE