Now you can look at a more realistic distribution of offspring. Choose the parents and the number of offspring you would like. This model has a random element built in so that the ratio of genotypes will be close to that predicted by a Punnett square but not exact. Is this more realistic?
When you have mastered this, try working the Punnett square backwards by moving to the next model.
Proceed to the next model by clicking on the butterfly 
or Next
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