Biological Science Seventh Edition Chapter 14 Mendel and the Gene Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved The pedigree below was created for race horses in an attempt to eliminate individuals susceptible to hyperkalemic periodic paralysis (HYPP). Circles represent females; squares represent males. Full symbols represent affected individuals. What type of disease is this? A. recessive autosomal B. dominant autosomal C. recessive sex-linked D. dominant sex-linked Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved The pedigree below was created for race horses in an attempt to eliminate individuals susceptible to hyperkalemic periodic paralysis (HYPP). Circles represent females; squares represent males. Full symbols represent affected individuals. What type of disease is this? A. recessive autosomal B. dominant autosomal C. recessive sex-linked D. dominant sex-linked Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved What is the probability of getting exactly two recessive traits in offspring of a cross between two parents with genotypes of AaBbCc? A. 1/16 B. 3/16 C. 1/2 D. 1/4 Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved What is the probability of getting exactly two recessive traits in offspring of a cross between two parents with genotypes of AaBbCc? A. 1/16 B. 3/16 C. 1/2 D. 1/4 Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved A cross between a black mouse and a brown mouse produced 4 black offspring and 4 brown offspring. Black coat color is dominant to brown coat color, and therefore you can conclude that ________. A. the black parent was homozygous B. both parents are homozygous C. the brown parent was heterozygous D. the black parent was heterozygous Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved A cross between a black mouse and a brown mouse produced 4 black offspring and 4 brown offspring. Black coat color is dominant to brown coat color, and therefore you can conclude that ________. A. the black parent was homozygous B. both parents are homozygous C. the brown parent was heterozygous D. the black parent was heterozygous Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved Red–green color blindness is caused by a recessive allele on the X chromosome. A female with normal vision whose father is colorblind marries a colorblind male. What is the probability that a son of this couple will be colorblind? A. 0 B. 0.25 C. 0.5 D. 0.75 Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved Red–green color blindness is caused by a recessive allele on the X chromosome. A female with normal vision whose father is colorblind marries a colorblind male. What is the probability that a son of this couple will be colorblind? A. 0 B. 0.25 C. 0.5 D. 0.75 Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved Alternative versions of individual genes are called ________. A. gametes B. alleles C. loci D. homozygous Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved Alternative versions of individual genes are called ________. A. gametes B. alleles C. loci D. homozygous Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved Mendel’s principle of segregation reflects what event in meiosis? A. separation of homologous chromosomes at meiosis II B. separation of sister chromatids at meiosis II C. separation of homologous chromosomes at meiosis I D. separation of sister chromatids at meiosis I Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved Mendel’s principle of segregation reflects what event in meiosis? A. separation of homologous chromosomes at meiosis II B. separation of sister chromatids at meiosis II C. separation of homologous chromosomes at meiosis I D. separation of sister chromatids at meiosis I Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved Which of the following is the chromosome composition of men? A. 44 autosomes + XY B. 44 autosomes + XX C. 46 autosomes + XY D. 46 autosomes + XX Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved Which of the following is the chromosome composition of men? A. 44 autosomes + XY B. 44 autosomes + XX C. 46 autosomes + XY D. 46 autosomes + XX Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved Goltz syndrome is a rare genetic disorder that causes skin abnormalities. If a man with Goltz syndrome marries an unaffected woman, all of their daughters, but none of their sons, will have the disorder. Therefore, this disorder is _____. A. recessive X-linked B. dominant X-linked C. recessive autosomal D. dominant autosomal Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved Goltz syndrome is a rare genetic disorder that causes skin abnormalities. If a man with Goltz syndrome marries an unaffected woman, all of their daughters, but none of their sons, will have the disorder. Therefore, this disorder is _____. A. recessive X-linked B. dominant X-linked C. recessive autosomal D. dominant autosomal Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved You are trying to map the relative positions of three genes: x, y, and z on a particular chromosome. You observe the following recombination frequencies in crosses involving the various gene pairs: xy = 6.9%, yz = 7.5%, xz = 0.7% What is the most likely gene order? A. x yz B. yzx C. yxz D. zyx Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved You are trying to map the relative positions of three genes: x, y, and z on a particular chromosome. You observe the following recombination frequencies in crosses involving the various gene pairs: xy = 6.9%, yz = 7.5%, xz = 0.7% What is the most likely gene order? A. x yz B. yzx C. yxz D. zyx Copyright © 2020, 2017, 2014 Pearson Education, Inc. All Rights Reserved
