1. A. albinism B. cystic fibrosis C. galactosemia D. Tay-Sachs 1. Identify the disease characterized by the absence of melanin. Complex Inheritance and Human Heredity Chapter 11 Chapter Diagnostic Questions

2. 2. Under what circumstances will a recessive trait be expressed? Complex Inheritance and Human Heredity Chapter 11 Chapter Diagnostic Questions A. A recessive allele is passed on by both parents. B. One parent passes on the recessive allele. C. The individual is heterozygous for the trait. D. The individual is homozygous dominant.

3. A. skin cells. 3. Where do gametes come from? Complex Inheritance and Human Heredity Chapter 11 11.1 Formative Questions B. the liver. C. gonads D. It is caused by acid excretion and results in sterility

4. A. DD B. Dd C. dd D. dE 4. Which is the genotype of a person who is a carrier for a recessive genetic disorder? Complex Inheritance and Human Heredity Chapter 11 11.1 Formative Questions

5. A. dosage compensation B. incomplete dominance C. multiple alleles D. sex-linked 5. When a homozygous male animal with black fur is crossed with a homozygous female with white fur, they have offspring with gray fur. What type of inheritance does this represent? Complex Inheritance and Human Heredity Chapter 11 11.2 Formative Questions

6. A. at least one parent is a carrier B. both parents are carriers C. both parents are homozygous recessive D. at least one parent is homozygous dominant 6. Albinism is a recessive condition. If an albino squirrel is born to parents that both have normal fur color, what can you conclude about the genotype of the parents? Complex Inheritance and Human Heredity Chapter 11 11.1 Formative Questions

7. A. autosomes B. centromere C. monosomes D. sex chromosomes 7. Of the 23 pairs of chromosomes in human cells, one pair is the _______. Complex Inheritance and Human Heredity Chapter 11 11.2 Formative Questions

8. A. blood type B. color blindness C. hemophilia D. skin color 8. Which is an example of a polygenic trait? Complex Inheritance and Human Heredity Chapter 11 11.2 Formative Questions

9. A. The blood type of an individual. B. The locations of genes on a chromosome. C. The cell’s chromosomes counted and arranged in pairs. D. The phenotype of individuals in a pedigree. 9. What does a karyotype show? Complex Inheritance and Human Heredity Chapter 11 11.3 Formative Questions

10. A. normal male. B. normal female. C. Down’s syndrome male. D. Down’s syndrome female. 10. What does this karyotype show? Complex Inheritance and Human Heredity Chapter 11 11.3 Formative Questions

11. A. multiple alleles B. nondisjunction C. mitosis D. correct meiosis 11. What is occurring in this diagram? Complex Inheritance and Human Heredity Chapter 11 11.3 Formative Questions

12. A. Down syndrome B. Klinefelter’s syndrome C. Tay-Sachs syndrome D. Turner’s syndrome 12. What condition occurs when a person’s cells have an extra copy of chromosome 21? Complex Inheritance and Human Heredity Chapter 11 11.3 Formative Questions

13. A. 1 and 2 are siblings B. 1 and 2 are parents C. 1 and 2 are offspring D. 1 and 2 are carriers 13. Use the figure to describe what the top horizontal line between numbers 1 and 2 indicates. Complex Inheritance and Human Heredity Chapter 11 Chapter Assessment Questions

14. A. I A B. I O C. I B D. i 14. Which is not an allele in the ABO blood group? Complex Inheritance and Human Heredity Chapter 11 Chapter Assessment Questions

15. A. heterozygous B. homozygous dominant C. homozygous recessive 15. If a genetic disorder is caused by a dominant allele, what is the genotype of those who do not have the disorder? Complex Inheritance and Human Heredity Chapter 11 Standardized Test Practice

16. A. RR B. Rr C. rr 16. Analyze this pedigree showing the inheritance of a DOMINANT genetic disorder. Which would be the genotype of the first generation father? Complex Inheritance and Human Heredity Chapter 11 Standardized Test Practice

17. A. codominance B. dosage compensation C. epistasis D. sex-linked 17. Shorthorn cattle have an allele for both red and white hair. When a red-haired cow is crossed with a white-haired bull, their calf has both red and white hairs scattered over its body. What type of inheritance does this represent? Complex Inheritance and Human Heredity Chapter 11 Standardized Test Practice

18. A. RR B. Rr C. rr 18. Analyze this pedigree showing the inheritance of a recessive genetic disorder. Which would be the genotype of II-2 ? Complex Inheritance and Human Heredity Chapter 11 Standardized Test Practice I II III 1 2 123456 123

19. A. Males have only one X chromosome. B. Males have two X chromosomes. C. Males have only one Y chromosome. 19. Why are males affected by recessive sex- linked traits more often than are females? Complex Inheritance and Human Heredity Chapter 11 Standardized Test Practice D. The traits are located on the Y chromosomes.

20. A. 25% B. 50% C. 75% D. 100% 20. A carrier of hemophilia and her husband, who is unaffected by the condition, are expecting a son. What is the probability that their son will have hemophilia? Complex Inheritance and Human Heredity Chapter 11 Standardized Test Practice