Gene, A section of DNA on a chromosome that has genetic information for one trait, Alleles, A different form of a gene, Phenotype, How traits appears or its expressed, Genotype, The alleles of all the genes on an organism's phenotype, Homozygous, A genotype in which the two alleles of a gene are the same, Heterozygous, A genotype in which the two alleles of a gene are different, Punnet square, A model that is used to show the probability of a possible genotype and phenotype of offspring, Heredity, The passing of traits from parents to offspring, Genetics, the study of how traits are passed from parent to offspring, Dominant trait, A genetic factor that blocks another genetic factor, Recessive trait, A genetic factor thats blocked by the presence of a dominant factor

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