Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 10.5, Problem 3MC
Summary Introduction
To determine:
The use of crossover frequencies to map genes on chromosomes.
Concept introduction:
The crossing over takes place in two homologous chromosomes in which genes are exchanged between the two chromosomes. This results in the formation of non identical chromatid and a recombinant offspring.
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Students have asked these similar questions
In linkage mapping, how do we measure the distance between genes on a chromosome?
options:
A) The number of gametes used is proportional to the percent recombination in offspring.
B) The number of offspring produced is equal to the percent recombination during crossover.
C) The number of chromosomes resulting from crossover is equal to the distance the genes are apart in any one gamete.
D) The percentage of recombinant offspring is directly proportional to how far apart the genes are on the chromosome.
In a series of mapping experiments, the recombination frequencies for four different linked genes were determined as follows:
vg= vestigial wings vg-b = 19
cn= cinnabar eyes vg-cn = 9
rb= reduced bristles vg-rb = 16
b= black body rb-b = 3.5
rb-cn = 6.5
cn-b = 9
Please map the genes in order on a chromosome. Which two genes are the closest together? What is your evidence?
What is the main goal of comparative genome hybridization?Explain how the ratio of green to red fluorescence provides informationabout chromosome structure?
Chapter 10 Solutions
Biology: Concepts and Investigations
Ch. 10.1 - Describe the relationships among chromosomes, DNA,...Ch. 10.1 - Prob. 2MCCh. 10.2 - Why did Gregor Mendel choose pea plants as his...Ch. 10.2 - Distinguish between dominant and recessive;...Ch. 10.2 - Prob. 3MCCh. 10.3 - What is a monohybrid cross, and what are the...Ch. 10.3 - How are Punnett squares helpful in following...Ch. 10.3 - Prob. 3MCCh. 10.3 - How does the law of segregation reflect the events...Ch. 10.4 - Prob. 1MC
Ch. 10.4 - Prob. 2MCCh. 10.4 - How can the product rule be used to predict the...Ch. 10.5 - How do patterns of inheritance differ for unlinked...Ch. 10.5 - What is the difference between recombinant and...Ch. 10.5 - Prob. 3MCCh. 10.6 - Prob. 1MCCh. 10.6 - Differentiate between pleiotropy and epistasis.Ch. 10.6 - How can the same phenotype stem from many...Ch. 10.6 - Figures 10.18 and 10.20 show two ways that a...Ch. 10.7 - Prob. 1MCCh. 10.7 - Prob. 2MCCh. 10.7 - Why do males and females express recessive...Ch. 10.7 - Prob. 4MCCh. 10.8 - Prob. 1MCCh. 10.8 - Prob. 2MCCh. 10.9 - Prob. 1MCCh. 10.9 - Prob. 2MCCh. 10.10 - Prob. 1MCCh. 10.10 - Prob. 2MCCh. 10 - In the list of four terms below, which term is the...Ch. 10 - According to Mendel, if an individual is...Ch. 10 - Prob. 3MCQCh. 10 - Which of the following is a possible gamete for an...Ch. 10 - Use the product rule to determine the chance of...Ch. 10 - Refer to the linkage map in figure 10.16b. A...Ch. 10 - How can epistasis decrease the number of...Ch. 10 - Prob. 8MCQCh. 10 - Prob. 9MCQCh. 10 - Prob. 1WIOCh. 10 - Prob. 2WIOCh. 10 - Some people compare a homologous pair of...Ch. 10 - How did Mendel use evidence from monohybrid and...Ch. 10 - Prob. 5WIOCh. 10 - Prob. 6WIOCh. 10 - Prob. 7WIOCh. 10 - Prob. 8WIOCh. 10 - Prob. 9WIOCh. 10 - A family has an X-linked dominant form of...Ch. 10 - X inactivation explains the large color patches in...Ch. 10 - Prob. 12WIOCh. 10 - Prob. 13WIOCh. 10 - Design an experiment using twins to determine the...Ch. 10 - Prob. 1GPCh. 10 - In Mexican hairless dogs, a dominant allele...Ch. 10 - A species of ornamental fish comes in two colors;...Ch. 10 - Two lizards have green skin and large dewlaps...Ch. 10 - Prob. 5GPCh. 10 - Prob. 6GPCh. 10 - Prob. 7GPCh. 10 - Prob. 8GPCh. 10 - Prob. 9GPCh. 10 - Prob. 1PITCh. 10 - Explain the effects of a mutation, using allele,...Ch. 10 - 3. Add meiosis, gametes, incomplete dominance,...
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- Why dont genetic markers on the Y chromosome undergo recombination? Why is this lack of recombination a necessity for these markers to be used in tracing migrations?arrow_forwardTHE GENES A, B AND C ARE LINKED ON CHROMOSOME 2 OF S. CEREVISIAE. IN A SERIES OF TWO-POINT MAPPING CROSSES, THE GENETIC DISTANCES SHOWN BELOW WERE DETERMINED. WHAT IS THE GENE ORDER? A-C: 28 A-B: 16 B-C: 41 A-B-C B-A-C A-C-Barrow_forwardRecombination frequencies between three loci in corn are shown in the following table: Loci Recombination frequency (%) R and W2 17 R and L2 35 W2 and L2 18 What is the order of the genes on the chromosome?arrow_forward
- What is linkage disequilibrium? How does it result in haplotypes?arrow_forwardIn a series of mapping experiments, the recombination frequencies for four different linked genes of the Drosophila fly were determined, as shown in the figure. Based on this information, what is the most probable order of these genes on the chromosome? b 0 cn 90 rb 3.5 6.5 0 vg 19 9.0 16 0 b cn rb vg The numbers in the boxes are the recombination frequencies in between the genes (in percent). O b-rb-cn-vg O vg-cn-b-rb Orb-cn-vg-b b = black body cn = cinnabar eyes rb = reduced bristles vg = vestigial wings O vg-b-rb-cnarrow_forwardRecombination 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 linkedarrow_forward
- A geneticist identifies 117 recombinant offspring out of a total of 1,359. What is the recombination frequency?arrow_forwardWhat is family pedigree studies ?arrow_forwardRecombination frequencies between three loci in corn are shown in the following table: Loci Recombination frequency R and W2 17 R and L2 35 W2 and L, 18 What is the order of the genes on the chromosome?arrow_forward
- Genes 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_forwardIn the diagram in the box below the horizontal line represents a chromosome and A, B, C, D and E represent the position of genes on the chromosome. You would expect the highest frequency of recombination of genes to occur between? A BC D E Lll S a) Between genes B and D b) Between genes B and C c) Between genes A and B d) Between genes A and Carrow_forwardAre two genes linked if not linked to the same marker on a chromosome.? Let's say we want to figure out whether two genes are linked on a particular chromosome so we cross-test them to a marker gene on that chromosome. Gene A is found to have an approximate 50% recombinant frequency so we say it's not linked to the marker. The other gene B however is found to have 40% recombinant frequency with our marker so we say it's linked. Now the question is are the two Genes A and B linked or not? Please explain your reasoning.arrow_forward
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