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Biology
Cell biology
Cell cycles, Chromosomes & Mitosis
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Created by
Emily Steel
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Cards (20)
What is the main focus of the video discussed in the study material?
The role of
chromosomes
in
cell division
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Why do
multicellular
eukaryotic
organisms require a continuous supply of new cells?
For
growth
,
development
, and
repair
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What is the process through which new cells are generated called?
The
cell cycle
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What are the three main stages of the
cell cycle
?
Growth
DNA replication
Mitosis
and division (
cytokinesis
)
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What happens during the growth stage of the
cell cycle
?
The cell increases in size and the number of
subcellular
structures
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What occurs during
DNA replication
in the
cell cycle
?
The DNA is duplicated for the two new cells
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How does
DNA
appear when a cell is not dividing?
It is spread out in long
strings
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What happens to
DNA
when a cell prepares for division?
It condenses into
chromosomes
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What do
chromosomes
contain that control the development of different characteristics?
Genes
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How many pairs of
chromosomes
do humans have?
23
pairs
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Why can't animals of
different
species reproduce to have fertile offspring?
They have different numbers of
chromosomes
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What shape do duplicated
chromosomes
take during cell division?
An
X shape
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What is the significance of the right and left arms of
each
chromosome
?
They are duplicates of each other
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What happens to the
chromosomes
during
cell division
?
They line up along the center of the cell
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What are the fibers that attach to chromosomes during division called?
Spindle fibers
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What occurs when the
spindle fibers
pull the arms of the
chromosomes
?
The chromosomes are separated into two arms
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What is the final stage of the cell cycle called?
Cytokinesis
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What happens during
cytokinesis
?
The
cell membrane
and cytoplasm pull apart to form two
daughter cells
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What is true about the resulting
daughter cells
after division?
They have the same
DNA
and are identical to each other and the parent cell
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How do
daughter cells
contribute to an organism after division?
They contribute to growth
They aid in development
They assist in repair
They undergo the
cell cycle
again
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