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Gen. Biology ch 14 Flashcards

ch 14 Gen. Bio

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104658350Characteran observable heritable feature0
104658351traitgenetically determined variant of a characteristic1
104658352True BreedingPlants that produce offspring of the same variety when they self-pollinate.2
104658353hybridizationmating or crossing of two true-breeding varieties3
104658354P Generationparental generation, the first two individuals that mate in a genetic cross, studies in inheritance. P = parental .4
104658355F1 GenerationThe first filial, or hybrid, offspring from P generation in a genetic cross-fertilization.5
104658356F2 generationOffspring resulting from interbreeding of the hybrid F1 generation. Second filial generation.6
104658357allelesalternative versions of a gene that produce distinguishable phenotypic effects variation in inherited character7
104658358Dominant alleleIn a heterozygote, the allele that is fully expressed in the phenotype.8
104658359Recessive allelean allele whose phenotypic effect is not observed in a heterozygote9
104658360Law of SegregationMendel's first law, stating that each allele in a pair separates into a different gamete during gamete formation.10
104658361Punnett SquareA diagram used in the study of inheritance to show the results of random fertilization.11
104658362Homozygoushaving two identical alleles for a given gene12
104658363Heterozygoushaving two different alleles for a given gene13
104658364phenotypeThe physical traits that appear in an individual as a result of its gentic make up.14
104658365Genotypegenetic makeup of an organism; an organism's combination of alleles15
104658366Test Crossbreeding of an organism of unknown genotype w/ a homozygous recessive individual to determine the unknown genotype16
104658367Monohybridsan organism that is heterozygous in a single gene, results from a cross of two different parents17
104658368dihybridsthe crossing of two true breeding parents differing in two characters that produce heterozygous for both characters18
104658369Law of independent assortmentMendel's law stating that pairs of genes during gamete formation separate independently of one another in meiosis19
104658370Complete dominanceThe situation in which the phenotypes of the heterozygote and dominant homozygote are indistinguishable20
104658371Incomplete dominanceThe situation in which the phenotype of heterozygotes is intermediate between the phenotypes of individuals homozygous for either allele21
104658372CodomanceThe situation in which the phenotype of both alleles are exhibited in the heterozygous because both alleles affect the phenotype in separate, distinguishable ways.22
104658373PleiotropyA single gene having multiple effects on an individuals phenotype23
104658374EpistasisA type of gene interaction in which one gene alters the phenotypic effects of another gene that is independently inherited.24
104658375Quantitative CharactersA heritable feature in a population that varies continuously as a result of environmental influences and the additive effect of two or more genes (polygenic inheritance).25
104658376Polygenic inheritanceAn additive effect of two or more gene loci on a single phenotypic character.26
104658377Norm of reactionThe range of phenotypes produced by a single genotype, due to environmental influences.27
104658378MultifactorialMany factors, both genetic and environmental, collectively influence phenotype.28
104658379Pedigreea family history that shows how a trait is inherited over several generations29
104658380CarriersHeterozygotes who carry a recessive trait for an inherited disorder and therefore, may transmit the allele to their offspring30
104658381Behavior of recessive allelesAlbinism loss of color,Cystic Fibrosis of European descents, and sickle cell African Americans low blood cells31
104658382Behavior of Dominant allelesHuntington"s Disease Death btwn 35-40, Achondroplasia Dwarfism32

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