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     Do you know what a Punnett square is? Do you know how to use them? A punnett square is used to tell what possible genotypes the parents offspring will be. For example, if you have a mom whose genotype is Tt and a dad whose genotype is tt then the possible genotypes or outcomes could have been Tt or tt. Your parents would have a 50% chance to have a heterozygous (Tt) and a 50% chance to have a homozygous recessive (tt). 
     Another example is if you have a mom with brown hair whose genotype is Bb and a dad with brown hair whose genotype is Bb, then the possible genotypes for the offspring would be BB, Bb, and bb. You would have the ratio 1:2:1 and you would also have a 75% chance for an offspring with brown hair and a 25% chance for 




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