Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 11, Problem 12TYU
Genes A and B are 6 map units apart, and A and C are 4 map units apart. Which gene is in the middle if B and C are 10 map units apart? Which is in the middle if B and C are 2 map units apart?
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If the map distance between genes A and B is 10 map units and the map distance between genes B and C is 25 map units,
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In a three-point mapping experiment for the genes a-w-ec, the following percentages of events are observed: NCO events: 57%; SCO events between a and w: 18%; SCO events between w and ec: 22%; DCO events: 2% Assuming that w is in the middle, what is the map distance between w and ec? What is the map distance between a and w? Draw the map.
Chapter 11 Solutions
Biology (MindTap Course List)
Ch. 11.1 - Define the terms phenotype, genotype, locus,...Ch. 11.1 - Describe Mendels principles of segregation and...Ch. 11.1 - Distinguish among monohybrid, dihybrid, and test...Ch. 11.1 - Explain Mendels principles of segregation and...Ch. 11.1 - What is the maximum number of different alleles...Ch. 11.1 - Can Mendels principle of segregation be...Ch. 11.1 - Prob. 3CCh. 11.2 - PREDICT Use the rules of probability to answer the...Ch. 11.2 - In answering the previous question, did you use...Ch. 11.3 - Define linkage and relate it to specific events in...
Ch. 11.3 - Show how data from a two-point test cross can be...Ch. 11.3 - Discuss the genetic determination of sex and the...Ch. 11.3 - What ratio of genotypes to phenotypes is observed...Ch. 11.3 - Prob. 2CCh. 11.3 - CONNECT Two loci exhibit 5% recombination between...Ch. 11.3 - Which chromosome determines the male sex in humans...Ch. 11.3 - Prob. 5CCh. 11.4 - Explain some of the ways genes may interact to...Ch. 11.4 - Distinguish among incomplete dominance,...Ch. 11.4 - Prob. 11LOCh. 11.4 - Prob. 1CCh. 11.4 - What is the difference between multiple alleles...Ch. 11.4 - Prob. 3CCh. 11.4 - Prob. 4CCh. 11 - One of the autosomal loci controlling eye color in...Ch. 11 - The F1 flies described in question 1 were mated...Ch. 11 - The type of cross described in question 2 is (a)...Ch. 11 - Individuals of genotype AaBb were crossed with...Ch. 11 - Assume that the ratio of females to males is 1:1....Ch. 11 - Redgreen color blindness is an X-linked recessive...Ch. 11 - When two long-winged flies were mated, the...Ch. 11 - The long hair of Persian cats is recessive to the...Ch. 11 - Mr. and Mrs. Smith are concerned because their own...Ch. 11 - A walnut comb rooster is mated to three hens. Hen...Ch. 11 - Individuals of genotype AaBb were mated to...Ch. 11 - Genes A and B are 6 map units apart, and A and C...Ch. 11 - VISUALIZE Sketch a series of diagrams showing each...Ch. 11 - Can you always ascertain an organisms genotype for...Ch. 11 - CONNECT Compare the mechanisms of genetic...Ch. 11 - EVOLUTION LINK Darwins theory of evolution by...Ch. 11 - INTERPRET DATA Using the graph in Figure 11-20,...
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- a) What gene is in the middle? b) Calculate the genetic distances (in centimorgans, cM) between: genes b and cn: genes cn and wx: genes b and wx: c) Calculate the interferencearrow_forwardWhat is the relationship between linked genes and syntenic genes? Are syntenic genes always linked? Are linked genes always syntenic? Describe what is meant by each termarrow_forwardWhat is the most likely order of the linked genes R, S, and T if the distance between R and S is 22 map units, the distance between S and T is 8 map units, and the distance between R and T is 14 map units?arrow_forward
- EC1. In drosophila the cw (curly wings) gene and eb (ebony body) genes are found on the same chromosome 20 map units apart. A cross was made between an ebony bodied parental strain and a curly winged parental strain and the F1’s were test crossed. a) What are the genotypes of the parental strains? b) What are the genotypes of the F1’s? c) What is the genotype of the tester strain? d) What progeny phenotypes and genotypes do you expect, and in what proportions? For phenotypes use the mutant phenotype for any that the flies have, and wild-type if they have none. EC2. Here is a tetrad produced by mating a H Y strain to an h y strain. a) What is the tetrad type? b) What has recombined with what? EC3. In corn, a dihybrid for the recessive genes a and b is test-crossed. The distribution of the phenotypes is as follows: A B 122A b 118a B 81a b 79 a) Do the genes appear to be sorting independently? Look at map units here. b) Test your hypothesis with a chi-squared test.arrow_forwardWhat is the order and interlocus distance between these 3 genes? which gene is in the middle and why,arrow_forwarda) Assume that colour is controlled by a single sex-influenced gene where green is expressed preferentially in males. Individuals I-1 and I-2 are homozygous for red and green respectively. Which individual/s in generation II will be red? b) If colour is a controlled by cytoplasmic DNA, which individual/s in generation II will be green?arrow_forward
- Part A: If the two genes are 30 mu apart and the plant is (AB/ab), what proportion of gametes from a single plant will be AB? Enter your answer as a decimal to three places (for example: 0.120). Part B: If the two genes are 30 mu apart and the plant is (AB/ab), what proportion of gametes from a single plant will be Ab? Part C: If the two genes are 30 mu apart and the plant is (AB/ab), what proportion of gametes from a single plant will be aB? Part D: If the two genes are 30 mu apart and the plant is (AB/ab), what proportion of gametes from a signal plant will be ab?arrow_forwardIn the fruit fly, dumpy wings (d) and purple eyes (p) are encoded by mutant alleles that are recessive to those that produce wild type traits; long wings (d+) and red eyes (p+). These two genes are on the same chromosome. In a particular lab, two researchers Walt and Jesse crossed a fly homozygous for dumpy wings and purple eyes with a fly homozygous for the wild type traits. The F1 progeny, which had long wings and red eyes, was then crossed with flies that had dumpy wings and purple eyes. Unfortunately, the progeny of this cross somehow escaped. To prevent their other projects from contamination, they decided to spend an exceptionally boring hour in the lab catching and counting the progeny and found the following: long wings, red eyes – 482 dumpy wings, purple eyes – 473 long wings, purple eyes – 23 dumpy wings, red eyes - 22 What is the genetic distance between these two loci? a. 4.5 cM b. 55 cM c. 45 cM d. 49.5 cM e. 4.7 cMarrow_forwardConstruct a map for the genes d,e,f. Assume that: d and e = 3%; e and f = 5%. Give 2arrangements of the genes/maps.arrow_forward
- In Figure 5-11, which donor alleles become part of therecombinant genome produced?arrow_forwardThe genome of Drosophila has been studied extensively using the technique of gene mapping. In Drosophila, pink eyes (P), curled wings (C), hairy body (H), and ebony body (E) are determined by alleles of genes located on the same chromosome. Gene Combination E/H C/H E/P H/P Frequency of Recombination 44% 23% 23% 21% Draw a gene map showing the correct order these genes appear on the chromosome. How frequently are the genes for pink eyes and curled wings expected to separate during crossing over?arrow_forwardThe normal sequence of markers on a certain Drosophila chromosome is ABCDE*FGHIJK, where the asterisk represents the centromere. Some flies were isolated with a chromosome aberration that has the following structure: ABCDE*FIJK . This represents a O a) deletion of GH segment O b) inversion of GH segment O c) deletion O d) deletion of centromerearrow_forward
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