Allele - Different forms of a gene., Dominant - An allele that masks the presence of another allele., Recessive - An allele that is masked by the presence of a dominant allele., Punnett Square -  A grid used to predict the outcomes of a genetic cross., Offspring - The progeny or descendants of organisms., Heterozygous - Tt ; Rr; Dd; Bb, Homozygous - tt; TT; rr: RR; BB; bb, Genotype - The genetic makeup of an organism, Phenotype - The physical expression of a genotype., Cross - The mating of two organisms.,

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