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 that is blocked by the presence of a dominant factor, gene - a section of DNA on a chromosome that has genetic information for one trait, allele - a different form of a gene, phenotype - how a trait appears or is expressed, genotype - the alleles of all the genes on an organism's chromosomes; controls 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, punnett square - a model that is used to show the genotypes and phenotypes of offspring , pedigree - a tool that shows phenotypes of genetically related family members,

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