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7th grade genetics #15388

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heredity   the passing of traits from parents to offspring  
gene   a factor that controls a trait  
trait   a characteristic that an organism passes on to its offspring. (color of hair, eye color)  
mutation   a change of chromosome  
hybrid   two different alleles for a trait (Aa, Tt, Bb)  
Punnett square   a chart that shows possible gene combinations  
dominant   a trait that shows up on an organism  
recessive   an allele that is covered up when a dominant allele is present. (Aa, Dd, Bb) recessive alleles-lower case letters  
probability   the likelihood that an event will occur  
purebred   2 of the same alleles for a trait (TT, BB, AA)  


   


 

 

 

 

 
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