12/2 Special Genetics

Today in class we covered codominance, incomplete dominance, and sex-linked problems. 

Codominance: both traits show. both dominant. 

Incomplete dominance: 1:2:1 ratio 
(P) red x white 
they make pink (F1)
F1 x F1
create white, pink, pink, red

Epistasis- product of genes make phenotype

Puppies! 
eebb and eeB_ = yellow
E_bb= chocolate
E_B_= black

BBEE x bbEE
F1= BbEe
F1 x F1

B_E_ black
bb_ _ choc. 
_ _ ee yellow 

Blood 
A and B are dominant over O
A and B completely dominate over each other 
AA and AO = A
BB and BO= B
AB=AB
OO= O

A man with a type A blood marries a woman with type A blood. They have the first child as blood type O. 

Genotypes
Father: AO
Mother: AO
Baby: OO