PreLecture 6 chromosomes_mitosis_1to20 by UPAD

Reminderhowmitosistsintothecellcycle g1sg2interphase

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Unformatted text preview: ed
of
two
 sister
chroma8ds:
 =
 =
 =
 =
 Your
turn
 Draw
the
chromosomes
in
a
cell
(2n=6)
before
and
aLer
 DNA
replica8on
(e.g.,
comparing
the
chromosomes
in
 the
cell
at
G1
and
G2).
Also
draw
the
cell
in
metaphase
 of
mitosis.
 Draw
the
"old"
and
"new"
DNA
strands
in
a
different
 colour.

**Remember
that
a
chroma8d
is
double‐ stranded
DNA.
 Bring
your
drawings
in
for
meiosis
next
class.
 

 
 
How
genes
fit
into
the
picture
 
 
(Goal
2)
 Why
is
mitosis
important?
 Meiosis
produced
an
egg
cell
from
your
mother
and
a
sperm
cell
from
your
father.

 They
combined
to
produce
the
fer8lized
egg
(zygote)
that
would
become
you.
 What
happened
next?

 How
do
we
create
mul8cellular
organisms
such
as
these
mushrooms?
 
 
 
 
 
 
 
Do
haploid
cells
go
through
mitosis?

...
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