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Name ______________________________ Class ___________________ Date __________________ Skills Worksheet Inheritance Patterns and Human Genetics In the space provided, write the letter of the description that best matches the term or phrase. _____ 1. causes death, often before birth a. linked genes _____ 2. chromosome breaks and piece reattaches backward b. map unit _____ 3. chromosome not involved in sex determination d. deletion c. frameshift mutation e. lethal mutation f. sex chromosome _____ 4. chromosome that determines sex g. genetic disorder _____ 5. autosomal dominant trait h. Huntington’s disease _____ 6. sample is taken from tissue between the uterus and the placenta i. germ-cell mutation _____ 7. sample is taken from fluid-filled sac k. amniocentesis _____ 8. one nucleotide replaces another l. genetic counseling j. autosome m. inversion _____ 9. disease caused by a mutation n. insertion mutation _____ 10. loss of a piece of chromosome o. gene therapy _____ 11. offers information about genetic makeup p. chromosome map _____ 12. influenced by both genetics and the environment r. chorionic villi sampling q. substitution s. complex characters t. somatic-cell mutation _____ 13. diagram that shows the location of genes _____ 14. occurs in a gamete _____ 15. frequency of crossing-over _____ 16. occurs in body cells _____ 17. places healthy copy of gene into a person whose gene is defective _____ 18. nucleotides are added to DNA _____ 19. genes that are inherited together _____ 20. all amino acids downstream are changed Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Modern Biology 23 Inheritance Patterns & Human Genetics Name ______________________________ Class ___________________ Date __________________ Inheritance Patterns and Human Genetics continued Write the correct term from the list below in the space next to its definition. carrier codominance incomplete dominance multiple alleles nondisjunction pedigree point mutation polygenic sex-influenced trait sex-linked trait translocation ______________________21.a family history that shows how a trait is inherited ______________________22.trait whose allele is located on the X chromosome ______________________23.when several genes influence a trait ______________________24.when an individual displays a trait that is intermediate between the two parents ______________________25.two dominant alleles are expressed at the same time ______________________26.genes with three or more alleles ______________________27.a piece of chromosome that attaches to a nonhomologous chromosome ______________________28.substitution, addition, or deletion of a nucleotide ______________________29.having one copy of a recessive allele ______________________30.males and females show different phenotypes but have the same genotype ______________________31.failure of homologues to separate during meiosis Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Modern Biology 24 Inheritance Patterns & Human Genetics