1) Heredity: The passing of traits from the parents to the offspring. 2) Genetics: The study of how traits are passed from the parents to the offspring. 3) Dominant trait: A genetic factor that blocks another genetic factor. 4) Recessive trait: A genetic factor that is blocked by the presence of a dominant trait. 5) Gene: A section in DNA on a chromosome that has genetic information for one trait. 6) Allele: A different form of a gene. 7) Phenotype: How a trait appears or is expressed. 8) Genotype: The alleles of all the genes on a organism's chromosomes; controls an organism's phenotype. 9) Homozygous: A genotype in which the two alleles of a gene are the same. 10) Heterozygous: A genotype in which the two alleles of a gene are different. 11) Punnett square: A model that is used to show the probability of all possible genotypes and phenotypes of offspring.

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