What is a Pedigree, a tool that shows phenotypes of genetically related family members, Heredity , The passing of traits from parents to offspring, Genetics , The study of how traits are passed down from parents to offspring, Dominant trait, a genetic factor that blocks another genetic factor, Recessesive trait , a genetic factor that is blocked by the pressure of a dominant, Gene, a section of DNA on a chromosome that has genetic information for one trait, Allele , a different form of a gene, Genotype , the alleles of all the genes on an organisms phenotype, Phenotype, how a trait appears or is expressed, Homozygous, a genotype in which two alleles of a game 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 all possible genotypes and phenotypes of a offspring.

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