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Download Term Definition Heredity Passing of traits from parent to offspring
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Transcript
Page __ Name:_____________________________________________ Science 8 – Hagan Date____________ Period____________ Mendel Genetics Vocabulary Term Definition Heredity Passingoftraitsfromparenttooffspring Genetics Studyofheredity Trait Purebred Gene Characteristicspassedontooffspringthroughgenes Organismthatalwaysproducesoffspringwithsame formoftraitasparent SegmentofDNAonachromosomethatcodesfora specifictrait Allele Differentformsofagene Allelewhosetraitalwaysshowsupinorganism whenthealleleispresent;overshadowsrecessive Dominantallele orotheralleles Allelethatismaskedwhenadominantalleleis Recessiveallele present;onlyseewhenbothgenesarerecessive Organismthathas2differentallelesforatrait; Hybrid organismthatisheterozygousforaparticulartrait Probability Likelihoodthataparticulareventwilloccur Chartthatshowsallthepossiblecombinationsof allelesthatcanresultinageneticcross;shows Punnettsquare possibleoffspring Organism’sphysicalappearance,orvisibletraits; Phenotype whatyousee Organism’sgeneticmakeup,orallelecombinations; Genotype genes Homozygous Having2identicalallelesforatrait Heterozygous Having2differentallelesforatrait Page __ Name:_____________________________________________ Science 8 – Hagan Date____________ Period____________ Conditioninwhichneitherof2allelesofageneis Codominance dominantorrecessive—both“equal” Processthatoccursinsexcells(sperm/egg)by whichthenumberofchromosomesisreducedby Meiosis half—Ifbodycell=46,sexcell=23 Gamete Sexcell;eggorsperm
