Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 13, Problem 4TYK
A number of genes carried on the same chromosome are tested and show the following crossover frequencies. What is their sequence in the map of the chromosome?
Genes Crossover Frequencies between Them
C and A 7%
B and D 3%
B and A 4%
C and D 6%
C and B 3%
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Construct a chromosome map from the following chart showing crossover frequencies for linkage groups on autosomes.
Gene Combinations
Recombination Frequency
a/b
2.5
a/c
3.0
b/c
5.5
b/s
5.5
a/s
8.0
c/s
11.0
Construct a chromosome map from the following charts showing crossover frequencies for linkage groups on autosomes. (this one is tricky due to the unusual recombinations
Gene Combinations
Recombination Frequency
y/w
2.2
v/m
3.0
v/r
26.6
v/w
30.0
v/y
32.2
w/m
33.0
y/m
35.2
w/r
56.6
Recombination frequencies have been determined between four genes (A, B, C and
D) as follows:
A-B: 20%,
B-C: 50%,
A-D: 50%,
C-D: 5%
Which of the four genes is/are likely linked on the same chromosome?
OC and D are linked
B and D are linked
A and C are linked
A and B are linked
Chapter 13 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 13.1 - You want to determine whether genes a and b are...Ch. 13.2 - You have a true-breeding strain of...Ch. 13.3 - What mechanisms are responsible for: (a)...Ch. 13.4 - A man has Simpson syndrome, an addiction to a...Ch. 13.4 - Prob. 2SBCh. 13.5 - Prob. 1SBCh. 13 - In humans, redgreen color blindness is an X-linked...Ch. 13 - The following pedigree shows the pattern of...Ch. 13 - Individuals affected by a condition known as...Ch. 13 - A number of genes carried on the same chromosome...
Ch. 13 - Prob. 5TYKCh. 13 - Discuss Concepts Can a linkage map be made for a...Ch. 13 - In Drosophila, two genes, one for body color and...Ch. 13 - Another gene in Drosophila determines wing length....Ch. 13 - Prob. 9TYKCh. 13 - You conduct a cross in Drosophila that produces...Ch. 13 - Discuss Concepts Crossing-over does not occur...Ch. 13 - Prob. 12TYKCh. 13 - Prob. 13TYKCh. 13 - Prob. 14TYKCh. 13 - Prob. 1ITDCh. 13 - Prob. 2ITDCh. 13 - Prob. 3ITDCh. 13 - Prob. 4ITD
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- . A three-point testcross was made in corn. The results and a recombination analysis are shown in the display below, which is typical of three-point testcrosses (p = purple leaves, + = green; v = virus-resistant seedlings, + = sensitive; b = brown midriff to seed, + = plain). Study the display, and answer parts a through c.arrow_forwardIn Figure 4-10, what is the mean frequency of crossoversper meiosis in the region A–B? The region B–C?arrow_forwardGenes Q, R, and S are on the same chromosome. The crossoverfrequency between S and Q is 5%, the crossover frequency betweenQ and R is 30%, and the crossover frequency between R and S is35%. Use this information to create a linkage map for thechromosomearrow_forward
- Figure 13.4 Which of the following statements is true? Recombination of the body color and red/ cinnabar eye alleles will occur more frequently than recombination of the alleles for wing length and aristae length. Recombination of the body color and aristae length alleles will occur more frequently than recombination of red/brown eye alleles and the aristae length alleles. Recombination of the gray/black body color and long/short aristae alleles will not occur. Recombination of the red/brown eye and long/short aristae alleles will occur more frequently than recombination of the alleles for wing length and body color.arrow_forwardIn a series of two-point map crosses involving five genes locatedon chromosome II in Drosophila, the following recombinant (single-crossover) frequencies were observed:pr–adp 29pr–vg 13pr–c 21pr–b 6adp–b 35adp–c 8adp–vg 16vg–b 19vg–c 8c–b 27 If the adp gene is present near the end of chromosome II(locus 83), construct a map of these genes.arrow_forwardRecombination frequencies between four genetically-linked loci in corn are shown in the following table: Loci Recombination Frequency (%) R and Q 45 W and Q 60 R and W 15 Q and L 10 L and R 35 What is the order of the genes on the chromosome? (note: The same answer can be represented forward or backwards. e.g. A B C D = D C B A) RQWL LQWR QWLR QRLW WRLQarrow_forward
- Construct a map of the chromosome, with the most accurate map distances, from the following recombination frequencies between individual pairs of genes: C –F 13%, V –F 20%, V –C 8%, S –F 4%, C –S 9%,arrow_forwardIn Drosophila (fruit flies), pink eyes (P), curled wings (C), a hairy body (H), and an ebony body (E) are determined by genes located on the same chromosome. Gene Combination Recombination Frequency E/H 41.7% C/H 18.2% E/P 22% H/P 19.7% Which of the following gene maps shows the gene sequence on this chromosome?arrow_forwardcan you please quickly explain?arrow_forward
- Construct a map of the chromosome from the following recombination frequencies between individual pairs of genes: c – f 8%, v – f 12%, s – v 16%, v – c 4%, s – f 6%arrow_forwardA diploid plant is heterozygous for two genes on the same chromosome, A and B. Crossovers between the two genes occurs in 100% of meiosis. What fraction of the gametes produced by this diploid plant are expected to be recombinant type? 25% O 50% 0% O 100%arrow_forwardIn a series of two-point map crosses involving five genes locatedon chromosome II in Drosophila, the following recombinant (single- crossover) frequencies were observed:pr–adp 29pr–vg 13pr–c 21pr–b 6adp–b 35adp–c 8adp–vg 16vg–b 19vg–c 8c–b 27 In another set of experiments, a sixth gene (d) was testedagainst b and pr, and the results were d - b = 17% andd - pr = 23%. Predict the results of two-point mapsbetween d and c, d and vg, and d and adp.arrow_forward
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