Patterns in Pedigrees A - sepuplhs.org

D-56 As you now know, genes are inherited and affect the characteris-tics of an organism. By growing Nicotiana seedlings, you ve seen how a trait is inherited. You have also seen how Punnett squares can help make predictions about inherited traits in large numbers of offspring. Studying human inheritance is more difficult. Scientists cannot perform breeding experiments on people. They must use other approaches when studying human genetics. Family histories, such as the one shown below, provide one way to gather evidence about inherited traits in Patterns in Pedigreesproblem solvingAlbertVictoriaQueen of England (1819 1901)VictoriaFrederickEdward VIIA lexandraAliceLouis of HesseIreneHenryFredAlixNikolas IIof RussiaWaldemarPrinceSigmund of PrussiaHenryOlgaTatianaMarieAnastasiaAle xisWilhelm IISophieof GreecePrincess MargaretQueen ElizabethPrince PhillipPrincessAnnPrinceCharlesPrinceAnd rewPrinceEdwardnormal Femalenormal Malehemophilic Malecarrier FemaleGeorge VGeorge VIA PArtiAl pedigree of HemoPHiliA in tHe royAl fAmilies of euroPeD-57 How can you use Pedigrees to study human traits?

D-59 Patterns in Pedigrees • Activity 66 Normal female Normal male Female with PKU Male with PKU fAmily witH PKu Learning from Data on Human Conditions Most human traits, such as height, for example, are the results of inter-

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