Alex Huang - Genetics Quizlet Terms

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Terms in this set (22)
HomozygousAn organism that has two identical alleles for a traitHeterozygousAn organism that has two different alleles for a traitGenotypegenetic makeup of an organismPhenotypeAn organism's physical appearance, or visible traits.Punnett SquareA chart that shows all the possible combinations of alleles that can result from a genetic crosshomozygous dominantBoth alleles (factors) for a trait are the same and dominant (AA)homozygous recessiveBoth alleles (factors) for a trait are the same and recessive (aa)Probablitylikelihood that a particular event will occurincomplete dominanceSituation in which one allele is not completely dominant over another alleleCo-dominancesituation in which both alleles of a gene contribute to the phenotype of the organismpedigree chartA chart which shows several generations of related families and how traits are passed down through the offspring.CarrierA person whose genotype includes a gene that is not expressed in the phenotype.