Ch. 12: Patterns of Heredity & Human Genetics Quiz DO NOT WRITE ON THIS QUIZ!!! WRITE ON YOUR OWN PAPER!!! MULTIPLE CHOICE Choose the correct letter to answer the question. 1. _______________ is when the alleles of both homozygous dominants are mixed together so that the heterozygous individual shows a phenotype between the two. A. codominance B. inheritance C. incomplete dominance D. dominant 2. Which of the following would a pedigree not be able to show you? A. family relationships B. age C. male or female D. individual affected by trait 3. _______________ is when the alleles of both homozygous dominants are expressed equally in the heterozygous individual. A. codominance B. inheritance C. incomplete dominance D. dominant 4. Chromosomes 1 – 22 are _____________. A. sex chromosomes B. homozygous C. autosomes D. gametes 5. _______________ is when a trait is controlled by many genes. A. x-linked B. codominance C. sex-linked traits D. polygenic inheritance 6. This disorder does not occur until 30-50 years of age. A. Tay-Sachs B. sickle cell C. Huntington’s 7. Tay-Sachs can cause death at the age of A. 2 B. 4 C. 6 D. Down’s syndrome D. 8 TRUE or FALSE Determine if the following statements are true or false. Write true or false. 8. Eye color and height are examples of polygenic inheritance. TRUE/ FALSE 9. Y-linked disorders are passed from father to daughter. TRUE / FALSE 10. Cystic fibrosis is a recessive disorder that causes mucus build up . TRUE / FALSE 11. In a pedigree, a carrier is represented by a fully shaded shape. TRUE / FALSE 12. Sex chromosomes are the 25th pair in humans. TRUE / FALSE 13. X-linked disorders are passed down from mother to son. TRUE / FALSE SHORT ANSWER List 5 of the 8 environmental factors that can influence gene expression. 14. 15. 16. 17. 18. FILL IN THE BLANK Label the following chart of symbols from a pedigree 19 20 22 21 23 24. In order to inherit a recessive disorder, what has to happen? 25. In order to inherit a dominant disorder, what has to happen? Bonus Questions B1. Name a recessive disorder. B4. Name a dominant disorder. B2. Name a X-linked disorder. B5. Name a chromosomal disorder. B3. Name a dominant trait.