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AP Biology Unit 4.8 - Mendelian Genetics Flashcards

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9450698182Gregor MendelAustrian monk known as the the Father of Genetics; studied inherited traits of pea plants0
9450698183Pea PlantsType of plant studied by Gregor Mendel1
9450698184PurebredAn organism that always produces offspring with the same form of a trait as the parent.2
9450698185Law of SegregationMendelian law stating that two alleles for each trait separate during meiosis3
9450698186Law of Independent AssortmentThe law that states that genes separate independently of one another in meiosis4
9450698187GeneA segment of DNA on a chromosome that codes for a specific trait/protein5
9450698188TraitA quality or characteristic of an organism.6
9450698189PhenotypeAn organism's physical appearance, or visible traits.7
9450698190GenotypeAn organism's genetic makeup, or allele combinations that determine traits.8
9450698191AlleleAn alternative form of a gene.9
9450698192HomozygousAn organism that has two identical alleles for a trait10
9450698193Homozygous DominantBoth alleles (factors) for a trait are the same and dominant (AA)11
9450698194Homozygous RecessiveBoth alleles (factors) for a trait are the same and recessive (aa)12
9450698195HeterozygousAn organism that has two different alleles for a trait13
9450698196DominantDescribes a trait that covers over, or dominates, another form of that trait.14
9450698197RecessiveAn allele that is masked when a dominant allele is present15
9450698198Punnet SquareDiagram showing the gene combinations that might result from a genetic cross16
9450698199Monohybrid CrossA cross between two individuals, concentrating on only one definable trait17
9450698200CodominanceA condition in which both alleles for a gene are fully expressed; neither is truly dominant.18
9450698201Incomplete DominanceCreates a blended phenotype; one allele is not completely dominant over the other.19
9450698202Sex LinkageOccurs when certain traits are determined by genes on sex chromosomes; for example, males are more likely to express recessive alleles on the X-chromosome20
9450703187Dihybrid CrossA cross between two organisms in which two traits are being considered.21
9450707125Gene LinkageGenes near each other on the same chromosome tend to be inherited together22

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