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Genetics
Review key termino;ogy in understanding chromosome theory
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| A | B |
| DNA | genetic material |
| nucleas | Cell organelle containing genetic material |
| chromosome | Made of DNA |
| genes | small section of DNA that calls for making a specific protein |
| trait | physical expression of a gene |
| XX | sex chromosomes for female |
| XY | sex chromosomes for male |
| number of chromosomes in a sperm cell | twenty three |
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