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Name ___________________________________________ Period _________ Date________________ Unit 10.2 Homework—Dihybrid Crosses and Gene Linkage 10.2.1 Calculate and predict the genotypic and phenotypic ratios of offspring of dihybrid crosses involving unlinked autosomal genes. _____________________________________________________________________________________________ _______________________________________________________________ _____________________________________________________________________________________________ _______________________________________________________________ 10.2.2 What is the difference between autosomes and sex chromosomes? _____________________________________________________________________________________________ _______________________________________________________________ ______________________________________________________________________________ Name ___________________________________________ Period _________ Date________________ Unit 10.2 Homework—Dihybrid Crosses and Gene Linkage 10.2.3 Explain how crossing over in prophase I (between non-sister chromatids of a homologous pair) can result in an exchange of alleles. _____________________________________________________________________________________________ _______________________________________________________________ _____________________________________________________________________________________________ _______________________________________________________________ 10.2.4 What is the definition of a linkage group? _____________________________________________________________________________________________ _______________________________________________________________ 10.2.5 Show an example of a cross between two linked genes. 10.2.6a Which offspring combinations in from the cross above would be considered recombinant? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ Name ___________________________________________ Period _________ Date________________ Unit 10.2 Homework—Dihybrid Crosses and Gene Linkage 10.2.6b In a dihybrid cross, which offspring combinations would be considered recombinant? ______________________________________________________________________________ _____________________________________________________________________________________________ _______________________________________________________________ _____________________________________________________________________________________________ _______________________________________________________________
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