dihybrid cross crossing two different traits hair length and eye color
TRANSCRIPT
Dihybrid Cross
Crossing two different traitsHair length and eye color
Hair Length
• LL – Ll short hair (dominant trait)
• ll long hair (recessive trait)
Eye Color
• RR – Rr black eyes(dominant)
• rr red eyes(recessive)
The Parents
• Both parents are heterozygous for both traits.
• Ll Rr
L l R r
FOIL the parents
L R rlL R rl
These are the different combinations of the two traits that the parents’ sex cells will contain.
LR
LR
Lr lR lr
Lr
lR
lr
LR
LR
Lr lR lr
Lr
lR
lr
L R
L R
L R
L R
L r
L r
L r
L r
l R
l R
l R
l R
l r
l r
l r
l r
LR
LR
Lr lR lr
Lr
lR
lr
L R
L R
L R
L R
L r
L r
L r
L r
l R
l R
l R
l R
l r
l r
l r
l r
LR
LR
Lr lR lr
Lr
lR
lr
LLRR
LLRr
LlRR
LlRr
LLRr
LLrr
LlRr
Llrr
LlRR
LlRr
llRR
llRr
LlRr
Llrr
llRr
llrr
What are the kids going to look like?
• LLRR• LLRr• LlRR• LlRr• LLrr• Llrr• llRR• llRr• llrr
Short hair, black eyes
Short hair, red eyes
Long hair, black eyes
Long hair, red eyes
LR
LR
Lr lR lr
Lr
lR
lr
LLRR
LLRr
LlRR
LlRr
LLRr
LLrr
LlRr
Llrr
LlRR
LlRr
llRR
llRr
LlRr
Llrr
llRr
llrr
What are the kids going to look like?
• LLRR• LLRr• LlRR• LlRr• LLrr• Llrr• llRR• llRr• llrr
Short hair, black eyes9
Short hair, red eyes3
Long hair, black eyes3
Long hair, red eyes1