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Chapter 15 Review 1 Based on the results of this cross, you determine that A B C D E 2 The results of the following cross indicate that the A B C D E 3 the allele for round eyes is linked to the allele for no tooth. round eyes are dominant to vertical eyes, and the absence of a tooth is dominant to the presence of a tooth. round eyes are dominant to vertical eyes, and the presence of a tooth is dominant to the absence of a tooth. vertical eyes are dominant to round eyes, and the absence of a tooth is dominant to the presence of a tooth. vertical eyes are dominant to round eyes, and the presence of a tooth is dominant to the absence of a tooth. two genes are linked. MendAlien species is polyploid. two genes assort independently. absence of a tooth is dominant to vertical eyes. absence of a tooth is dominant to the presence of a tooth. An F1 individual can produce _____ different gametes when both eye and tooth genes are considered. A B C D E 1 2 3 4 5 11/29/2011 8:39:17 PM Page 1 Chapter 15 Review 4 Page 2 Given these chromosomes, which of the choices represents the possible recombinant gametes? A B C D E 5 The results of a F1 testcross are: 250 bald head, four ears : 247 hairy head, six ears : 21 bald head, six ears : 19 hairy head, four ears. How many map units apart are the head and ear genes? A B C D E 3.5 3.9 7.5 50.5 92.6 11/29/2011 8:39:17 PM Chapter 15 Review 6 Which of the individuals is homozygous recessive for both of the gene pairs? A B C D E 7 The results of the following cross indicates that the A B C D E 8 two genes are linked. MendAlien species is polyploid. two genes assort independently. absence of a tooth is dominant to vertical eyes. absence of a tooth is dominant to the presence of a tooth. The recombination frequency between gene A and gene B is 8.4%, the recombination frequency between gene A and gene C is 6.8%, and the recombination frequency between gene B and gene C is 15.2%. Which of these is the correct arrangement of these genes? A B C D E 9 the male parent the F1 generation the female parent both the male and female parents both the male parent and the F1 generation ABC ACB BCA CAB CBA A color-blind woman mates with a male with normal color vision. Which of these results would indicate that color blindness is caused by an X-linked recessive allele? A B C D E Half of the sons and half of the daughters are color-blind. All of the daughters, and none of the sons, are color-blind. All of the sons, and none of the daughters, are color-blind. The offspring occur in a ratio of 3 color-blind : 1 normal vision. The offspring occur in a ratio of 9 normal vision males : 3 color-blind vision males : 3 normal vision females : 1 color-blind female. 11/29/2011 8:39:17 PM Page 3 Chapter 15 Review 10 Color blindness is an X-linked recessive trait. A color-blind man has a daughter with normal color vision. What is the genotype of the daughter? A B C D E 11 All the offspring have normal color vision. 3 normal vision female : 1 color-blind male 1 normal vision female : 1 color-blind male 2 normal vision females : 1 normal vision male : 1 color-blind male 1 normal vision female : 1 color-blind female : 1 normal vision male : 1 color-blind male Color blindness is an X-linked recessive trait. A color-blind man has a daughter with normal color vision. She mates with a color-blind male. What is the expected phenotypic ratio of their offspring? A B C D E 13 XcY XCY XcXc XCXC XCXc Color blindness is an X-linked recessive trait. A color-blind man has a daughter with normal color vision. She mates with a male who has normal color vision. What is the expected phenotypic ratio of their offspring? A B C D E 12 Page 4 All the offspring have normal color vision. 3 normal vision female : 1 color-blind male 1 normal vision female : 1 color-blind male 2 normal vision females : 1 normal vision male : 1 color-blind male 1 normal vision female : 1 color-blind female : 1 normal male : 1 color-blind male Color blindness is an X-linked recessive trait. A woman who is homozygous for normal color vision mates with a color-blind male. What is the expected phenotypic ratio of their offspring? A B C D E All the offspring have normal color vision. 1 normal vision female : 1 color-blind male 3 normal vision female : 1 color-blind male 2 normal vision females : 1 normal vision male : 1 color-blind male 1 normal vision female : 1 color-blind female : 1 normal male : 1 color-blind male 11/29/2011 8:39:17 PM Chapter 15 Review 14 Color blindness is an X-linked recessive trait. A color-blind woman mates with a male with normal color vision. What is the expected phenotypic ratio of their offspring? A B C D E 15 He can't. His mate is color-blind. His father is color-blind. His mother is color-blind. He is heterozygous for color vision. Hypophosphatemia (vitamin D-resistant rickets) is inherited as an X-linked dominant. An unaffected woman mates with a male with hypophosphatemia. What is the expected phenotypic ratio of their offspring? A B C D E 17 All the offspring have normal color vision. 3 normal vision female : 1 color-blind male 1 normal vision daughter : 1 color-blind son 2 normal vision females : 1 normal-vision male : 1 color-blind male 1 normal vision female : 1 color-blind female : 1 normal male : 1 color-blind male Color blindness is an X-linked recessive trait. Under what conditions can an unaffected male have a color-blind daughter? A B C D E 16 Page 5 3 normal female : 1 male with hypophosphatemia 1 daughter with hypophosphatemia : 1 normal son 1 normal daughter : 1 son with hypophosphatemia 2 normal females : 1 normal male : 1 male with hypophosphatemia 1 normal female : 1 female with hypophosphatemia : 1 normal male : 1 male with hypophosphatemia Hypophosphatemia (vitamin D-resistant rickets) is inherited as an X-linked dominant. A woman without hypophosphatemia and a man with hypophosphatemia have a daughter. The daughter mates with a male without hypophosphatemia. What is the expected phenotypic ratio of their offspring? A B C D E 1 unaffected daughter : 1 son with hypophosphatemia 1 daughter with hypophosphatemia : 1 unaffected son 3 unaffected females : 1 male with hypophosphatemia 2 unaffected females : 1 unaffected male : 1 male with hypophosphatemia 1 unaffected female : 1 female with hypophosphatemia : 1 unaffected male : 1 male with hypophosphatemia 11/29/2011 8:39:17 PM Chapter 15 Review 18 Suppose that having three nostrils is a dominant Y-linked character. A woman with two nostrils mates with a man with three nostrils. What is the expected phenotypic ratio of their offspring? A B C D E 19 12 23 36 45 92 _____ is the process by which haploid gametes form a diploid zygote. A B C D E 22 1 2 3 4 5 Humans are diploid and have 46 chromosomes. How many chromosomes are found in each human gamete? A B C D E 21 1 daughter with two nostrils : 1 son with three nostrils 2 daughters with two nostrils: 1 son with two nostrils: 1 son with three nostrils 2 daughters with three nostrils: 1 son with two nostrils: 1 son with three nostrils 2 sons with two nostrils: 1 daughter with two nostrils: 1 daughter with three nostrils 1 daughter with two nostrils: 1 daughter with three nostrils: 1 son with two nostrils : 1 son with three nostrils Humans are diploid and have 46 chromosomes (or two sets). How many sets of chromosomes are found in each human gamete? A B C D E 20 Page 6 Mitosis Meiosis Fertilization Gastrulation Embryogenesis A particular diploid plant species has 48 chromosomes, or two sets. A mutation occurs and gametes with 48 chromosomes are produced. If self-fertilization occurs, the gametes will have _____ set(s) of chromosomes. A B C D E 1 2 3 4 5 11/29/2011 8:39:17 PM Chapter 15 Review 23 Which of these terms applies to an organism with extra sets of chromosomes? A B C D E 24 Mutant tetraploid plants A B C D E 25 diploid haploid trisomy polyploid monosomy are usually sickly. are unable to self-fertilize. have an odd number of chromosomes. are able to interbreed with their parents. are unable to interbreed with a diploid plant. Most polyploid plants arise as a result of A B C D E mitosis. meiosis. hybridization. self-fertilization. a mutation of gamete formation. 11/29/2011 8:39:17 PM Page 7 Chapter 15 Review Page 8 Answer Key : Chapter 15 Review Question: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 11/29/2011 8:39:17 PM Answer B C D D C C A D C E E E A C A B E A A B C D D E C