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Lesson Sequence
1.
2.
3.
4. Genetic Crosses
5.
6.
7.
8.
9.
10.
Resources needed:
• Genetic crosses Harry Potter worksheet. (1
per student)
• Info sheet for teacher
• Req: none
PLTS icons
if needed
mardi 23 mai 2017
Tuesday, 23 May 2017
martes, 23 de mayo de 2017
Genetic crosses
Level
Objective
E/D Explain how recessive
Outcome
Complete the starter successfully
and dominant genes
interact
C/B Interpret and draw punnet
squares and family trees.
AA*
Consider the ethical
issues of genetic
counselling.
Complete of 1 & 2 of Harry Potter tasks. Slides
19- 23
Answer question on slide 31 and page
Starter: Charlie has Hazel eyes. Her parents both
Keywords
have blue eyes. Draw a diagram to EXPLAIN how this can
be
Dominant,
recessive,
punnet square,
family tree.
Extension:
Explain why you have some features that are similar
to your siblings. Use the word allele in your answer.
carrier
mardi 23 mai 2017
Tuesday, 23 May 2017
martes, 23 de mayo de 2017
Genetic crosses
We need some definitions: match the correct word to the
definition:
Dominant
Carrier
Recessive
Genotype
Phenotype
Your genetic
make up
What you look
like
Rr
RR rr
Extension:
Explain why you have some features that are similar
to your siblings. Use the word allele in your answer.
Keywords
Dominant,
recessive,
punnet square,
family tree.
carrier
mardi 23 mai 2017
Tuesday, 23 May 2017
martes, 23 de mayo de 2017
Genetic crosses
We need some definitions: match the correct word to the
definition:
Dominant
RR
Carrier
Rr
Recessive
rr
Genotype
Phenotype
Your genetic
make up
What you look
like
Keywords
Dominant,
recessive,
punnet square,
family tree.
Extension:
Explain why you have some features that are similar
to your siblings. Use the word allele in your answer.
carrier
mardi 23 mai 2017
Tuesday, 23 May 2017
martes, 23 de mayo de 2017
Genetic crosses
Naked Scientist
animation! (from
interactive book)
Keywords
Dominant,
recessive,
punnet square,
family tree.
Extension:
Explain why you have some features that are similar
to your siblings. Use the word allele in your answer.
carrier
How are characteristics inherited?
I don’t understand
why she is a
Witch if her parents
are muggles?
No wonder, Malfoy!
You didn’t pay attention in
my genetics lessons!!!
Inheritance of characteristics
I still don’t understand
why she is a witch…
But it’s easy!!!
Let me explain
some Wizard Genetics
to you
Like muggles,
Wizards
Let’s doinherit
some
It’s
all
Being
allele
for
one The
allele
from
their mum,
Wizard
genetics…
How
are
Wizards
made?
in
their
genes!!!!
a
muggle
being
a
Wizard
is
m dad
and one allele from their
is
Thedominant
allele for
over is M
being a muggle
being
a Wizard…..
Wizards and muggles…
Let’s do some
Wizard genetics…
The allele for being a Wizard is ………
The allele for being a muggle is ………
Being a muggle is ………………………
over being a Wizard
Wizards and muggles…
Let’s do some
Wizard genetics…
Answer the questions on
Wizard genetics
on your worksheets....
The Potters
- What alleles do Harry’s parents have?
- What were the chances of Harry being a Wizard?
Harry’s
grandparents
-
What alleles do Lily’s parents have?
What were the chances of Lily being a witch?
What were the chances of Petunia being a muggle?
What are the chances that Petunia is a “carrier”?
Harry’s grandmother
Harry’s
granddad
Lily Potter
Petunia Dursley
The Dursleys
Vernon
Petunia
Even if Petunia was a carrier of the Wizarding
allele, is there any chance at all that Dudley was
a Wizard?
What are his odds at best (given his father is not a
Wizard?
The Malfoys
The Grangers
Why is Hermione a
witch?
What were the chances?
Tom Riddle
Tom Riddle was a half-blood.
His mother was a witch and his father was a
muggle.
What alleles did his parents have?
What were the chances that Tom Riddle was a
wizard?
Hermione
+
Ron
Will their children definitively be Wizards and
Witches?
Filch
Argus Filch is a squib. His parents were Wizards,
but doesn’t really have any wizarding abilities.
Suggest an explanation.
Harry
+ Ginny
Speaking Parseltongue is a rare feature in the
Wizarding world.
Only descendents from Slytherin might have this ability.
Harry speaks Parseltongue, but Ginny doesn’t and
neither did Harry’s parents.
Suggest if the allele for speaking Parseltongue is
dominant or recessive:
What are the chances that Harry’s and Ginny’s children
speak Parseltongue if (a) Ginny isn’t a carrier and (b) if
Ginny does carry the allele?
(a)
(b)
Harry +
Voldemort
(c) Actually, Harry didn’t inherit the two recessive
Parseltongue alleles, but they were transferred to
his DNA when Voldemort tried to kill him.
What is the scientific name for this process?
Remus
(a) Being werewolf (W) is dominant over not being a
werewolf (w). Remus Lupin is a werewolf (Ww), but
his wife , Nymphadora Tonks, is not.
What are the chances that their son is a werewolf?
Remus
(b) Both Remus and Nymphadora also carry the
allele for speaking Parseltongue.
What are the chances that their son is a werewolf
who speaks Parseltongue?
Genetic crosses
MID-LESSON PROGRESS CHECK
Swap work with the person next to you.
Are they on track to meet their target?
Level
Objective
Outcome
E/D
Explain how recessive
and dominant genes
interact
Complete the starter successfully
C/B Interpret and draw
punnet squares and
family trees.
AA*
Consider the ethical
issues of genetic
counselling.
Complete of 1 & 2 of Harry Potter tasks. Slides 1923
Answer question on slide 31 and page
Family trees
Family tree
• Family tree genetic diagrams are used
by doctors to provide genetic
counselling for couples with genetic
disorders prior to pregnancy.
Q. Explain why they are useful and what
ethical considerations such counselling
might raise.
Plenary: What have you learnt today?
Level
Objective
Outcome
E/D
Explain how recessive
and dominant genes
interact
Complete the starter successfully
C/B Interpret and draw
punnet squares and
family trees.
AA*
Consider the ethical
issues of genetic
counselling.
Complete of 1 & 2 of Harry Potter tasks. Slides 1923
Answer question on slide 31 and page
Plenary task
Write one thing you know well this lesson and
one thing you need to improve on.
Next lesson: Inherited Disorders
5 mins