First, we have to figure out all possible gamete combinations using that FOIL method'

1
First, we have to figure out all possible gamete
combinations (using that FOIL method).

• For example
• Patrick is heterozygous for his pink body color
  but is purebred dominant for having large eyes.
• What is the genotype for his body color? Pp
• What is the genotype for his round eyes? RR
• Together, this is PpRR.
• Now, lets figure out the possible gamete
  combinations
• P p R R
• So, the possible gamete combinations are
• PR, PR, pR, pR

2
Now, lets do the same for Patricks new lady,
Patti

• For example
• Patti is homozygous recessive for her yellow
  body, but is heterozygous for her large eyes.
• What is the genotype for her body color? pp
• What is the genotype for his round eyes? Rr
• Together, this is ppRr.
• Now, lets figure out the possible gamete
  combinations
• p p R r
• So, the possible gamete combinations are
• pR, pr pR, pr

3
We put gamete combos on axis and fill in
PR
PR
pR
pR
PpRR
PpRR
ppRR
ppRR
pR
PpRr
ppRr
ppRr
pr
PpRr
pR
PpRR
PpRR
ppRR
ppRR
PpRr
ppRr
ppRr
pr
PpRr
Ta-Daa!!!! ?
4
Man Hemophiliac, Carrier of sickle cell
diseaseWoman No history of hemophilia,
Carrier of sickle cell
5
Man Hemophiliac, Carrier of sickle cell
diseaseWoman No history of hemophilia, Carrier
of sickle cell
6

• Girl with sickle cell disease?

2/16
7

• Hemophiliac boy with sickle cell disease?

0/16
8

• Girl who carries hemophilia and sickle cell
  disease?

4/16
9

• Child with sickle cell disease?

4/16