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Crossing two different traits Hair length and eye color
Dihybrid Cross Crossing two different traits Hair length and eye color
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Hair Length LL – Ll short hair (dominant trait)
ll long hair (recessive trait)
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Eye Color RR – Rr black eyes (dominant) rr red eyes (recessive)
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The Parents Both parents are heterozygous for both traits. Ll Rr
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L L L l R r l l R R r r FOIL the parents
These are the different combinations of the two traits that the parents’ sex cells will contain.
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LR Lr lR lr LR Lr lR lr
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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
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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
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LR Lr lR lr LR Lr lR lr LLRR LLRr LlRR LlRr LLRr LLrr LlRr Llrr LlRR
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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
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LR Lr lR lr LR Lr lR lr LLRR LLRr LlRR LlRr LLRr LLrr LlRr Llrr LlRR
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What are the kids going to look like?
LLRR LLRr LlRR LlRr LLrr Llrr llRR llRr llrr Short hair, black eyes 9 Short hair, red eyes 3 Long hair, black eyes 3 Long hair, red eyes 1
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