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Biology A Chapter 10 Multiple Choice(1-8 plus 1-24 worth 100 points) Identify the letter of the choice that best completes the statement or answers the question. ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ 1. When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _____ occurs. a. crossing over c. hybridization b. mutagenesis d. fertilization 2. Crossing over results in a _____. a. female genotype c. genetic recombination b. male genotype d. phenotype replication 3. The _____ produced by each parent are shown along the sides of a Punnett square. a. zygotes c. gametes b. offspring d. hybrids 4. A useful device for predicting the possible offspring of crosses between different genotypes is the _____. a. law of dominance c. Punnett square b. law of independent assortment d. testcross 5. The passing on of traits from parents to offspring is called _____. a. genetics c. inbreeding b. heredity d. gene splicing 6. The statement: "In meiosis, the way in which a chromosome pair separates does not affect the way other pairs separate," is another way of expressing Mendel's law of _____. a. dominance c. independent assortment b. first filial generations d. Punnett squares 7. Cells containing two alleles for each trait are described as _____. a. haploid c. diploid b. gametes d. homozygous 8. The gamete that contains genes contributed only by the mother is _____. a. the sperm c. a zygote b. an egg d. dominant 9. A female guinea pig homozygous dominant for black fur color is mated with a male homozygous for white fur color. In a litter of eight offspring, there would probably be _____. a. 8 black guinea pigs b. 4 black and 4 white guinea pigs c. 2 black, 4 gray, and 2 white guinea pigs d. 8 white guinea pigs 10. The numbers in Figure 10-1 represent the chromosome number found in each of the dog cells shown. The processes that are occurring at A and B are _____. Figure 10-1 a. mitosis and fertilization b. meiosis and fertilization c. mitosis and pollination d. meiosis and pollination ____ 11. Genes located on homologous chromosomes may have alternate forms that control different forms of a trait. These alternate forms of a gene are called _____. a. alleles c. phenotypes b. centromeres d. gametes ____ 12. A white mouse whose parents are both white produces only brown offspring when mated with a brown mouse. The white mouse is most probably _____. a. homozygous recessive c. homozygous dominant b. heterozygous d. haploid ____ 13. In mink, brown fur color is dominant to silver-blue fur color. If a homozygous brown mink is mated with a silver-blue mink and 8 offspring are produced, how many would be expected to be silver-blue? a. 0 c. 6 b. 3 d. 8 Figure 10-7 ____ 14. How should the top row of Figure 10-7 read? a. MMXX, MMXx, MmXX, MmXx c. mMXX, mMXx, mmXX, mmXx b. MMxX, MMxx, MmxX, Mmxx d. mMxX, mMxx, mmxX, mmxx ____ 15. What fraction of this cross will be recessive for both traits? a. 1/2 c. 1/8 b. 1/4 d. 1/16 Matching Match each item with the correct statement below. a. crossing over e. b. meiosis f. c. dihybrid g. d. heredity h. ____ ____ ____ ____ ____ ____ ____ 16. 17. 18. 19. 20. 21. 22. Problem haploid homozygous zygote fertilization The exchange of genetic material between homologous chromosomes The uniting of the male and female gametes The cell produced when a male gamete fuses with a female gamete The type of cell division that produces gametes A cell that contains one member of each chromosome pair The alleles present for a trait are the same The passing of characteristics from parents to offspring 23. A heterozygous tall plant is crossed with another heterozygous tall plant. Draw a punnet square to show the possible offspring. 24. In Question #24 what fraction or percentage is predicted to be homozygous recessive? Essay(Worth 18 points) 25. List the steps of Meiosis and give a brief description of what occurs during each step. Meiosis I ___________________- _____________________________________________ ___________________- _____________________________________________ ___________________- _____________________________________________ ___________________- _____________________________________________ ___________________- _____________________________________________ Meiosis II ___________________- _____________________________________________ ___________________- _____________________________________________ ___________________- _____________________________________________ ___________________- _____________________________________________ Bonus(5 Points) 26. In chickens, rose comb (R) is dominant to single comb (r). A homozygous rose-combed rooster is mated with a single-combed hen. All of the chicks in the F1 generation were kept together as a group for several years. They were allowed to mate only within their own group. What is the expected phenotype(include fraction or percentage) of the F2 chicks? Biology A Chapter 10 Answer Section MULTIPLE CHOICE 1. ANS: STA: 2. ANS: STA: 3. ANS: STA: 4. ANS: STA: 5. ANS: STA: 6. ANS: STA: 7. ANS: STA: 8. ANS: STA: 9. ANS: STA: 10. ANS: STA: 11. ANS: STA: 12. ANS: STA: 13. ANS: STA: 14. ANS: STA: 15. ANS: STA: A 27 | 28 | 36 C 27 | 28 | 36 C 10 | 26 | 27 C 10 | 26 | 27 B 2 | 26 | 27 C 2 | 28 | 36 C 36 B 36 A 10 | 26 | 27 B 36 A 2 | 26 | 27 A 10 | 26 | 27 A 10 | 26 | 27 A 10 | 26 | 27 D 10 | 26 | 27 PTS: 1 DIF: B OBJ: 10-4 PTS: 1 DIF: B OBJ: 10-4 PTS: 1 DIF: B OBJ: 10-2 PTS: 1 DIF: B OBJ: 10-2 PTS: 1 DIF: B OBJ: 10-1 PTS: 1 DIF: B OBJ: 10-5 PTS: 1 DIF: B OBJ: 10-3 PTS: 1 DIF: B OBJ: 10-3 PTS: 1 DIF: B OBJ: 10-2 PTS: 1 DIF: B OBJ: 10-3 PTS: 1 DIF: B OBJ: 10-1 PTS: 1 DIF: B OBJ: 10-2 PTS: 1 DIF: B OBJ: 10-2 PTS: 1 DIF: A OBJ: 10-2 PTS: 1 DIF: A OBJ: 10-2 A 27 | 28 | 36 H 36 G 36 B 36 PTS: 1 DIF: B OBJ: 10-4 PTS: 1 DIF: B OBJ: 10-3 PTS: 1 DIF: B OBJ: 10-3 PTS: 1 DIF: B OBJ: 10-3 MATCHING 16. ANS: STA: 17. ANS: STA: 18. ANS: STA: 19. ANS: STA: 20. ANS: STA: 21. ANS: STA: 22. ANS: STA: E 36 F 2 | 26 | 27 D 2 | 26 | 27 PTS: 1 DIF: B OBJ: 10-3 PTS: 1 DIF: B OBJ: 10-1 PTS: 1 DIF: B OBJ: 10-1 PROBLEM 23. ANS: z PTS: 1 24. ANS: z PTS: 1 ESSAY 25. ANS: m PTS: 1 OTHER 26. ANS: 75% rose comb and 25% single comb PTS: 1