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Dihybrid Cross

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1. Key: C = Curly hair D = Dark. c = Straight hair d = Blond. Cross: CCdd x CcDd. Gametes: ... Genotype: Phenotype: 2 Curly Dark : 2 Curly Blond. 1. C. C. D. d ... – PowerPoint PPT presentation

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Title: Dihybrid Cross


1
Dihybrid Cross
2 traits
T tall
Y yellow
Key
t short
y green
TY
ty
Ty
tY
Independent Assortment
2
Cross
Heterozygous tall yellow with a heterozygous tall
yellow
Cross
TtYy x TtYy
Gametes
Ty
tY
ty
TY
TY
Ty
tY
ty
3
Punnett Square
T
Y
Y
T
T
Y
y
t
Y
Y
T
t
Y
y
T
T
T
Y
y
T
T
y
y
T
t
Y
y
t
y
y
T
T
y
T
t
Y
Y
T
t
Y
y
t
t
Y
Y
t
t
Y
y
y
y
y
t
t
y
y
T
t
Y
T
t
t
t
Y
4
Punnett Square
1
5
7
9
5
Genotype








Phenotype
9 Tall Yellow
3 Tall Green
3 Short Yellow
1 Short Green
6
Practice Problems - Dihybrid
1. Key C Curly hair D Dark c Straight
hair d Blond Cross CCdd x CcDd Gametes
Cd
Cd
Cd
Cd
CD
Cd
cD
cd
7
Punnett Square
CD
Cd
cD
cd
Cd
CCDd
CCdd
CcDd
Ccdd
Cd
CCDd
CCdd
CcDd
Ccdd
Cd
CCDd
CCdd
CcDd
Ccdd
Cd
CCDd
CCdd
CcDd
Ccdd
8
Genotype



4 CCdd
4 CcDd
4 Ccdd
Phenotype
8 Curly Dark
8 Curly Blond
9
Shortcut
Genotype

Phenotype
2 Curly Dark
2 Curly Blond
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