Heredity, Passing of traits from parents to children., Meiosis, Makes 4 reproductive cells, Genes, Instructions for your looks, Dominant Genes, Stronger genes (B), Recessive Genes, Weaker genes (b), Genotypes, 2 genes, Phenotype, Physical Looks, Purebred, Pure for one trait BB or bb, Hybrid, Mix of traits Bb, XX, Female chromosome pair, XY, Male chromosome pair, 23 chromosomes, Number of chromosomes in one reproductive cell..

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