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Transcript
Do now!
Can you read
through the
investigation
sheet you stick
in last lesson?
In what ways are we different from
each other (“variations”)?
In what ways are we different from
each other (“variations”)?
In your
groups can
you roughly
list as many
differences
as you can?
In what ways are we different from
each other (“variations”)?
Can you now
divide these
differences
between those
that are
inherited and
those which are
environmental
and those
which might be
both.
Examples
inherited
environment
both
Earlobe shape
scars
Intelligence
Eye colour
language
Body mass
Nose shape
height
Investigating variation
Investigating variation
Investigation to
be finished for
homework. Due
Wednesday 14th
October
Continuous variation
Continuous variation
• Either many genes are involved in that
characteristic
• Or the genes are operating with
environmental effects too
6
5.5
5
4.5
4
3.5
3
2.5
2
1.5
5
5.5
6
6.5
7
7.5
8
8.5
9
Continuous variation
• Either many genes are involved in that
characteristic
• Or the genes are operating with
environmental effects too
• Body mass
• Milk yield
• Hand size
Discontinuous variation
Discontinuous variation
• A single gene
gives the
characteristic
• The gene
operates with
no
environmental
effects
Discontinuous variation
• A single gene
gives the
characteristic
• The gene
operates with
no
environmental
effects
Tongue rolling
Blood group
Eye colour
Sex