1. Warmup 11/3-4/16 Objective Tonight’s Homework
How would you explain genetics (so far) to a 5th grader?
Objective Tonight’s Homework
To see how genotype and phenotype apply
pp 127: 2, 5
Finish the “odds” for your kid

2. Making a Kid Using Genetics
In this activity, you’ll be pairing up with a friend and combining traits to make a kid. One of you will be “mom” and the other will be “dad”. Choose however you want.
Each of you is going to choose what your genes are. Then, you’ll randomly combine them to see what kind of kid they make. Afterwards, you’ll use what you know about genetics to explain the odds.
To start, get out a piece of paper and tear it in half. One half goes to mom, the other to dad. As mom and dad, you and your partner need to go through the list on the next slide and pick 1 choice from each of the options presented.

3. Making a Kid Using Genetics
COLORBLINDNESS (sex-linked)
Colorblindness in some form affects about 10% of all men. It’s much rarer in women.
Mom: pick one of the following groups:
Dad: pick one of the following groups:
XG XG
XG Xg
Xg Xg
Not colorblind
colorblind
XG Y
Xg Y
Not colorblind
colorblind

4. Making a Kid Using Genetics
BALDNESS (sex-linked)
This affects men much more than women and is sometimes called “male pattern baldness”.
Mom: pick one of the following groups:
Dad: pick one of the following groups:
XB XB
XB Xb
Xb Xb
Not balding
balding
XB Y
Xb Y
Not balding
balding

5. Making a Kid Using Genetics
BLOOD TYPE (Multiple alleles)
Each of you pick one of the following groups:
IA IB
IA i
IB i
i i
Type AB
Type A
Type B
Type O

6. Making a Kid Using Genetics
HAIR COLOR (Multiple alleles)
Each of you pick one of the following groups:
HBR HBR
HBR hbl
HBR HBL
hbl hbl
HBR hr
brown
Lt. brown
Dk. brown
blonde
copper
HBL hbl
HBL HBL
hbl hr
HBL hr
hr hr
Dk. blonde
black
strawberry
auburn
red

7. Making a Kid Using Genetics
HEIGHT (multiple gene interaction)
Each picks a mix of capital and lowercase letters for “AABBCC”. The more capital letters, the taller your kid. The more lowercase, the shorter.
Ex: aabbcc = pretty much a midget
AaBbCc or AABbcc or AAbBcc, etc = average
AABBCC = basketball superstar
SKIN COLOR (multiple gene interaction)
Each picks a mix of capital and lowercase letters for “XXYYZZ”. The more capital letters, the darker your kid. The more lowercase, the lighter.
Ex: xxyyzz = super white. Like Sweden or Ireland
XxYyZz or XXYyzz or XXyYzz, etc = brown-skinned
XXYYZZ = very dark black skin

8. Making a Kid Using Genetics
EYE COLOR (multiple gene interaction)
Each pick one of the following groups:
AA BB
AA Bb
Aa BB
Aa Bb
aa BB
aa Bb
brown
hazel
AA bb
Aa bb
aa bb
green
blue

9. Making a Kid Using Genetics
(incomplete dominance)
Each parent, pick one from each of the following groups:
Eyebrows
E E
E e
e e
separate
slight merge
unibrow
Face Shape
F F
F f
f f
square
oval
round
Hair Type
H H
H h
h h
straight
wavy
curly

10. Making a Kid Using Genetics
(incomplete dominance)
Each parent, pick one from each of the following groups:
Mouth Size
M M
M m
m m
Large
Medium
Small
Nose Size / Ear Size
A A
A a
a a
Body Shape
B B
B b
b b
Skinny
Normal
Big Boned

11. Making a Kid Using Genetics
(dominant-recessive)
Each parent, pick one from each of the following groups:
Max Hair Length
L L
L l
l l
Unlimited
Shoulder blades
Vision
V V
V v
v v
Good
Need Glasses
Body Hair
R R
R r
r r
Hairy
Normal
Hairless

12. Making a Kid Using Genetics
Now you’re ready to put together your genes to make a kid. To start, the dad is going to flip the coin.
If it comes up heads, it’s a boy. If it comes up tails, it’s a girl. (Sorry moms, your genes don’t determine gender.)
Next, get another piece of paper. Make 5 columns. One called “trait”, one called “mom”, one called “dad”, one called “kid”, and one called “odds”.
In the “trait” column, write down the name of each of the genes we just went over.

13. Making a Kid Using Genetics
You should now have this:
Trait
Colorblind
Baldness
Blood Type
Hair Color
Height
Skin Color
Eye Color
Eyebrows
Face Shape
Hair Type
Mouth Size
Nose / Ear
Body Shape ……
Mom
Dad
Kid
Odds

14. Making a Kid Using Genetics
You’re going to go through each trait. For each one, mom and dad have to flip coins. If your coin flip comes up positive, you pick the first of your 2 letters to add to the kid. If it comes up tails, you add the second letter.
Example: Eye color
Mom has Aa bB – brown eyes
Dad has aa bb – blue eyes
Mom’s flip comes up heads, so she uses A
Mom flips again and gets heads again, so she uses b
Dad’s flip comes up tails, so he uses a
Dad’s second flip comes up heads, so he uses b
Combine these for the kid to get – Aa bb – green eyes

15. Making a Kid Using Genetics
On the sex-linked ones, dad doesn’t flip a coin. If they have a girl, he uses just his “X” gene. If they have a boy, he just uses his “Y” gene.
For height and skin color, you’ll flip like normal for A, B, and C, and X, Y, and Z and then just put them all together.
Ex: Mom = AABbCc Dad = aaBBCC
Mom flips: heads (A), tails (b), and tails (c)
Dad flips: tails(a), tails (B), heads (C)
So the kid will be: AaBbCc

16. Making a Kid Using Genetics
When you’re done getting all the way through your list, you need to name your kid, do a drawing of them on the back of your paper, and put your names on it.
Your homework is going to be filling in the “odds” column.
Mom Dad Kid Odds
Ex: IA IB IB i IB IB 25%
To get the odds, make a punnet square and tell me the chance of getting what you got. Make sure to turn in your work as well, so Mr. C. can check! IA IB
IA IB
IB IB i
IA i
IB i

17. Exit Question If you mix dominant and recessive genes, which wins?
a) The recessive one
b) The dominant one
c) They mix evenly
d) It depends on what kind of gene it is