Transcript I will be able to use pedigrees to investigate

Thursday, February 18, 2016
•
•
HOMEWORK: DNA bases (color and cut) due Mon
2/29
Finish Pedigree Evidence 2
OBJECTIVE: I will be able to use pedigrees to
investigate inheritance and will be able to understand
how to read a pedigree
•
DO NOW: Turn in Pedigree 1. No HW= Pink Slip!
Look at the family on the handout on your desk and
notice that the grandfather and the grandson don’t
have dimples, but the parents do. “What is your best
explanation for how this happens?”
Do Now
Doc #1:
What is your best explanation for
how this happens?
Grandmother
Grandfather
dimples
no dimples
Mother
Father
dimples
dimples
Son
no dimples
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree
DN
or
DD
NN
Grandmother
Grandfather
dimples
no dimples
DN
DN
Mother
Father
dimples
dimples
Son
I will be able to use
pedigrees to investigate
inheritance and will be
able to understand how to
read a pedigree
no dimples
NN
Genes
D= Dimples
N= No Dimples
DN
or
DD
NN
Grandmother
Grandfather
dimples
no dimples
DN
DN
Mother
Father
dimples
dimples
Son
I will be able to use
pedigrees to investigate
inheritance and will be
able to understand how to
read a pedigree
no dimples
NN
Genes
D= Dimples
N= No Dimples
DN
or
DD
NN
Grandmother
Grandfather
dimples
no dimples
DN
DN
Mother
Father
dimples
dimples
Son
I will be able to use
pedigrees to investigate
inheritance and will be
able to understand how to
read a pedigree
no dimples
NN
Genes
D= Dimples
N= No Dimples
PRACTICE
What is the relationship
between person 1 to
person 5?
Answer: Grandfather
2. Who in this family has
the disease?
Answer:
Grandmother,
Father,
Son 3
3. What
doand
persons
and
5 have
in common?
Answer:
They
are male
and have
CF5’s
4. Does
person
grandmother have CF?
Answer: Yes
1
3
2
4
5
I will be able to use pedigrees to investigate inheritance and will be able to understand how
to read a pedigree
PRACTICE
1
2
3
4
5
6
1. Who is person 6 to
person 2?
Answer:
2. In thisGranddaughter
example who
has CF?
Answer: Persons 2, 3,
and 5 (Grandmother,
3. What
is person
4’s sex
Father,
Daughter)
and do they have the
disease?
Answer: Female, no CF
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree
Family C
Father’s
Father
Father’s
Mother
Mother’s
Mother’s
Father
Mother
Mother’s
Father
Son
Mother
Daughter
Brother
?
He isThis
alsoisthe
theUncle
of the Son
and
Mother’s
brother.
Daughter.
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree
Let’s use
evidence 2 to
figure out the
rules for how
a trait can
skip a
generation.
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree
•Identify what genes you think are being passed on from one generation to
the next and how many genes are actually being passed on from parents to
children. Is it just one gene from each parent? Two? Three?
•Show how many of each gene is being passed on in the boxes and circles on
the pedigree. You can abbreviate the gene with a letter and indicate how
many of that gene each person has.
•Whatever ideas you come up with should work for all families.
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree
•
Evidence
2
Question 6: Get into groups, with two pairs in each group.
Share your rules with your group and discuss the following
questions.
• Question 7: What kind of evidence would be helpful to decide
which set of rules for the strong gene model is the best one?
• Question 8: Is there any evidence that either contradicts your
rules or is not explained by your rules? If there is any evidence
that is not explained by your rules or contradicts them then you
should discuss changes to the rules so that they can explain
this evidence.
• Question 9: Discuss changes to the rule set that both pairs
agree on.
Evidence 2
Question 10:
• Write down your revised rules for how the strong gene model works.
These rules should describe how genes and traits are inherited in
families. Remember, the rules have to work for all individuals in all
three families!
1._______________________________________________________
2._______________________________________________________
3._______________________________________________________
4._______________________________________________________
5._______________________________________________________
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree
CLOSURE
• Question 11:
• As a group take a
second look at the
Mother’s Brother.
Based on your group’s
set of rules (from
Question 8) what
genes do you think the
mother’s brother has?
Does he have the
disease? Give reasons
for your answer.
I will be able to use pedigrees to investigate inheritance and will be able to understand how to read a
pedigree