Sex - Linked

1
Sex - Linked
2
Dominant Sex-Linked Cross
Trait Name __Sex______ Parents _XX__ x
__XY_ Possible Sperm ______ Possible Egg
______ Offspring Genotypes __________________ R
atio _______________________ Phenotypes
_________________ Ratio _______________________
3
Rett Syndrome

• Brain disorder.
• Small hands and feet.
• Hand shakes.
• Hands always in the mouth.

4
Dominant Sex-Linked Cross
Trait Name __Rett Syndrome______ Has Trait
Males _________ Females __________________ No
Trait Males __________ Females
__________________ Parents _____ X
_____ Possible Sperm ______ Possible Egg
______ Offspring Genotypes __________________ R
atio _______________________ Phenotypes
_________________ Ratio _______________________
5
Hemophelia

• Missing clotting factors.
• Cant stop bleeding.

6
Recessive Sex-Linked Cross
Trait Name __Hemophelia______ Has Trait Males
_________ Females __________________ No Trait
Males __________ Females __________________ Pare
nts _____ X _____ Possible Sperm ______
Possible Egg ______ Offspring Genotypes
__________________ Ratio _______________________
Phenotypes _________________ Ratio
_______________________
7
Color Blindness

• http//colorvisiontesting.com/ishihara.htmsecond
  20test20plate

8
Recessive Sex-Linked Cross
Trait Name __Color Blindness______ Has Trait
Males _________ Females __________________ No
Trait Males __________ Females
__________________ Parents _____ X
_____ Possible Sperm ______ Possible Egg
______ Offspring Genotypes __________________ R
atio _______________________ Phenotypes
_________________ Ratio _______________________