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Product #: SED10597_TQLife Science: The World of Genetics (Resource Book Only) eBookGrade 4|Grade 5|Grade 6|Grade 7|Grade 8Sale! Ships Free!
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To understand why humans are the way they are, look at cells-especially the material in the center, called chromosomes. People have 23 pairs of chromosomes, so each cell has 46 in all. Parents pass chromosomes to their children. DNA carries the genetic information in alleles and is the blueprint for the cells of an organism. DNA tells one's body how to put certain materials together to produce certain traits.
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