 HAPPY MONDAY 
Bellwork:
Turn in Pages 74 (to tray) &
80 (to front table).
Draw the pedigree chart
and determine the
genotypes for numbers 1-5
using the information
given.
Small Group
CHAMPS
Tt
Shaded = Tongue Rolling
E2
Computer
tt
tt
Tt
Not Shaded = Non Tongue Rolling
Tongue Rolling (T) is Dominant to
Non Tongue Rolling (t)
5
tt
With your table partner, write down the correct answers for questions on your
bellwork page. The pedigree chart below depicts albinism, a recessive trait, in a
family. Use the pedigree chart to answer questions.
A. How many affected females are shown?
1
A. 1
aa
AA or Aa
B. 2
C. 3
D. 4
Aa
B. What is the mostly likely
genotype(s) of individual #1?
A. AA or Aa
B. Aa only
C. aa only
D. AA, Aa, or aa
aa
Aa
Aa
Aa
Aa
aa
Case Study #1
A = Normal
-2 points each
shape
-2 points each
genotype
a = albinism
Aa
A-
Aa
aa
A-
Aa
Aa
Aa
Aa
aa
Case Study #2
H = Huntington's
Disease
h = Normal
hh
hh
hh
Hh
hh
hh
H-
Hh
hh
hh
hh
hh
hh
hh
-2 points each
shape
-2 points each
genotype
Hh
1. Heterozygous
-2 points
2. Nn
each
3. No
Case Study #3
N = Neurofibromatosis
n = Normal
Nn
nn
-2 points each
genotype
nn
Nn
nn
nn
nn
nn
nn
Nn
Nn
nn
Nn
N-
N-
nn
Collect Today
Page 74 – Family Tree Project Part 1
Page 80 – Pedigree Practice
Page 76 – Alien Genetics CORRECTIONS
IBB MAKE-UP Quiz
Assigned
Page 70 – Notecard ALL PARTS (Thursday)
Most Missed MAKE-UP Quiz (Thursday)
Genetics MAKE-UP Quiz (Monday – 12/14)
Page 77 – Family Tree Project Part 2 (Monday – 12/14)
Genetics Exam (Monday – 12/14)
Late
Page 76 – Alien Genetics (-50%)
Page 78 – Penny Lab (-30%)
Unit 5 – Genetics
1.
2.
3.
4.
5.
6.
7.
8.
9.
PG 70
Definitions Due Thursday (12/3/15)
All Parts Due Thursday (12/10/15)
Allele
10.Hybrid
18.Purebred
Co-Dominance
11.Incomplete
19.Recessive
Dominance
Dihybrid Cross
20.Sex-linked Traits
12.Monohybrid
Dominant
13.Multiple Alleles
Gene
14.Pedigree
Genotype
15.Phenotype
Gregor Mendel
16.Polygenic
Heterozygous
17.Punnett Square
Homozygous
Essential Question
PG 81
How do we model
crossing two traits?
Standard
B6F - Predict possible outcomes of genetic combinations such as
dihybrid crosses.
Direct Instruction
CHAMPS
Dihybrid Cross:
a cross that shows the possible
offspring for two traits
Fur Color:
B: Black
b: White
Coat Texture:
R: Rough
r: Smooth
In this example, we will cross a
heterozygous individual with another
heterozygous individual. Their
genotypes will be:
BbRr x BbRr
Dihybrid Cross
BbRr x BbRr
DAD
MOM
Step 1: Find ALL possible gametes that can be made from each parent.
Remember, each gamete must have one B and one R.
Dihybrid Cross
BbRr x BbRr
DAD
Possible gametes:
BR
Br
bR
br
MOM
FOIL
Step 2: Arrange all possible
gametes for one parent on
the top of your Punnett
Square and the other parent
on the side
Dihybrid Crosses:
a cross that shows the possible offspring for two traits
BR
BbRr x BbRr
Fur Color:
B: Black
b: White
Coat Texture:
R: Rough
r: Smooth
Step 3: Fill in the
Punnett Square
(find the possible
genotypes of the
offspring)
BR
Br
bR
br
Br
bR
br
Dihybrid Crosses:
a cross that shows the possible offspring for two traits
BR
Br
bR
br
BR
BBRR
BBRr
BbRR
BbRr
Br
BBRr
BBrr
BbRr
Bbrr
bR
BbRR
BbRr
bbRR
bbRr
br
BbRr
Bbrr
bbRr
bbrr
BbRr x BbRr
Fur Color:
B: Black
b: White
Coat Texture:
R: Rough
r: Smooth
How many of the
offspring would have a
black, rough coat?
How many of the
offspring would have a
black, smooth coat?
How many of the
offspring would have a
white, rough coat?
How many of the
offspring would have a
white, smooth coat?
BR
Br
bR
br
BR BBRR
BBRr
BbRR
BbRr
Br
BBRr
BBrr
BbRr
Bbrr
bR
BbRR
BbRr
bbRR
bbRr
br
BbRr
Bbrr
bbRr
bbrr
Fur Color:
Coat Texture:
B: Black
R: Rough
b: White
r: Smooth
How many of the
offspring would have
black, rough coat?
How many of the
offspring would have a
black, smooth coat?
How many of the
offspring would have a
white, rough coat?
How many of the
offspring would have a
white, smooth coat?
BR
Br
bR
br
BR BBRR
BBRr
BbRR
BbRr
Br
BBRr
BBrr
BbRr
Bbrr
bR
BbRR
BbRr
bbRR
bbRr
br
BbRr
Bbrr
bbRr
bbrr
Phenotypic Ratio=
9:3:3:1
Fur Color:
Coat Texture:
B: Black
R: Rough
b: White
r: Smooth
Practice in your notes…
Assign
Identify
Match
In pea plants, yellow seeds (Y) are dominant over green seeds
(y), and rounded peas (R) are dominant over wrinkled peas
(r).
yellow
Y
R rounded
y
green
r
wrinkled
Cross (what do you have to draw?) a plant that is heterozygous
for both traits with a plant that is homozygous recessive for
both traits. Draw a Punnett square to show all possible
offspring, and determine the genotypic and phenotypic
ratios.
Male = YyRr
Female = yyrr
YyRr X yyrr
FOIL
Male = YR Yr yR yr
yr
YR
Yr
YyRr
Yyrr
yr
YyRr
yr
YyRr
Yyrr
yR
yr
yyRr
yyrr
yyRr
yyrr
Female = yr yr yr yr
Yyrr
yyRr
yyrr
Genotypic = 1:1:1:1
Phenotypic = 1:1:1:1
yr
YyRr
Yyrr
yyRr
yyrr
YyRr X yyrr
FOIL
Male = YR Yr yR yr
yr
YR
Yr
YyRr
Yyrr
yr
YyRr
yr
YyRr
Yyrr
yR
yr
yyRr
yyrr
yyRr
yyrr
Female = yr yr yr yr
Yyrr
yyRr
yyrr
Genotypic = 1:1:1:1
Phenotypic = 1:1:1:1
yr
YyRr
Yyrr
yyRr
yyrr