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Biology paper 1
Chromosomes and Mitosis
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Created by
Sadiya Uddin
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Cards (9)
Chromosomes
Contain
genetic information
Chromosomes
Contain a
large
number of
genes
Different
genes control the
development
of different
characteristics
Chromosome content in body cells
Two copies
of each
chromosome
- one from the
organism's mother
and one from its
father
The diagram shows the
23 pairs
of
chromosomes
from a human
cell
Cell cycle
A series of stages that a cell goes through to produce
new cells
for
growth
,
development
and
repair
Mitosis
The stage of the
cell cycle
when the
cell divides
Mitosis
Results in
two new cells
with the
same number
of
chromosomes
Produces
identical daughter cells
Growth & DNA Replication
1.
DNA
is
spread out
in a
non-dividing cell
2.
Cell
begins to
condense DNA
3.
Cell
makes a
copy
of the
DNA
, forming
X-shaped chromosomes
4.
Chromosomes line
up at the
centre
of the
cell
5.
Cell pulls
the
chromosomes
apart
6.
Membrane
forms around
each set
of
chromosomes
7.
Cell divides
Mitosis
produces
identical daughter
cells
