GENETIC ANALYSIS: AN INTEG. APP. W/MAS
2nd Edition
ISBN: 9781323142790
Author: Sanders
Publisher: Pearson Custom Publishing
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Chapter 22, Problem 39P
New allopolyploid plant species can arise by hybridization between two species. If hybridization occurs between a diploid plant species with
a. Is it likely that sexual reproduction between the allopolyploid species and either of its diploid ancestors would yield fertile progeny? Why or why not?
b. What type of isolation mechanism is most likely to prevent hybridization between the allopolyploid and the diploid species?
c. What pattern of
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In 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 C
Among a large population of 2 million gray mosquitoes, one mosquito is heterozygous for a body color gene; this mosquito has one gray allele and one blue allele. There is no selective advantage or disadvantage between gray and blue body color. All of the other mosquitoes carry two copies of the gray allele.
A. What is the probability of fixation of the blue allele?
B. If fixation happens to occur, how many generations is it likely to take?
C. Qualitatively, how would the answers to parts A and B be affected if the blue allele conferred a slight survival advantage?
Suppose researchers studied the first chromosome of a new species and mapped three genes of interest, indicated as a, b, and c. A three‑factor cross was performed and the number of gametes formed from the F2 generation was recorded in a table. Note that the order of genes in the table is arbitrary.
Calculate the recombination frequencies for each given gene pair in map units.
a+ b+ c+
a b c
a b+ c+
a+ b c
a b+ c
a+ b c+
a b c+
a+ b+ c
173
176
35
33
11
10
3
1
After completing the gene mapping, the researchers treated individuals to induce inversions in the chromosomes. After treatment, another three‑factor cross was performed and the number of gametes formed from the F2 generation was recorded in a second table. Note that the order of genes in the table is arbitrary.
a+ b+ c+
abc
a b+ c+
?+ b c
a b+ c
a+ b c+
a b c+
a+ b+ c
188
185
24
26
1
0
49
46
Calculate the recombination frequencies for each given gene pair in map units.
Chapter 22 Solutions
GENETIC ANALYSIS: AN INTEG. APP. W/MAS
Ch. 22 - 20.1 Compare and contrast the terms in each of the...Ch. 22 - In a population, what is the consequence of...Ch. 22 - 20.3 Identify and describe the evolutionary forces...Ch. 22 - Describe how natural selection can produce...Ch. 22 - Thinking creatively about evolutionary mechanisms,...Ch. 22 - 20.6 Genetic drift, an evolutionary process...Ch. 22 - Over the course of many generations in a small...Ch. 22 - Catastrophic events such as loss of habitat,...Ch. 22 - 20.9 George Udny Yule was wrong in suggesting that...Ch. 22 - 20.10 The ability to taste the bitter compound...
Ch. 22 - Figure 20.6 illustrates the effect of an ethanol ...Ch. 22 - 20.12 Biologists have proposed that the use of...Ch. 22 - 20.13 Two populations of deer, one of them large...Ch. 22 - 20.14 Directional selection presents an apparent...Ch. 22 - 20.15 What is inbreeding depression? Why is...Ch. 22 - 20.16 Certain animal species, such as the...Ch. 22 - Genetic Analysis 20.1 predicts the number of...Ch. 22 - 20.18 In a population of rabbits, and . The...Ch. 22 - Sickle cell disease (SCD) is found in numerous...Ch. 22 - 20.20 Epidemiologic data on the population in the...Ch. 22 - The frequency of tasters and nontasters of PTC...Ch. 22 - Tay-Sachs disease is an autosomal recessive...Ch. 22 - 20.23 Cystic fibrosis (CF) is the most common...Ch. 22 - 20.24 In the mouse, Mus musculus, survival in...Ch. 22 - 20.25 In a population of flowers growing in a...Ch. 22 - Assume that the flower population described in the...Ch. 22 - 20.27 ABO blood type is examined in a Taiwanese...Ch. 22 - 20.28 A total ofmembers of a Central American...Ch. 22 - 20.29 A sample offield mice contains individuals...Ch. 22 - Prob. 30PCh. 22 - Albinism, an autosomal recessive trait...Ch. 22 - Prob. 32PCh. 22 - 20.33 Evaluate the following pedigree, and answer...Ch. 22 - Evaluate the following pedigree, and answer the...Ch. 22 - The following is a partial pedigree of the British...Ch. 22 - Draw a separate hypothetical pedigree identifying...Ch. 22 - Prob. 37PCh. 22 - 20.38 Achromatopsia is a rare autosomal recessive...Ch. 22 - 20.39 New allopolyploid plant species can arise by...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- As the number of generations increases in a population, it would be expected that O a. The number of meiotic recombination events would increase and linkage disequilibrium would decrease O b. The number of meiotic recombination events would decrease and linkage disequilibrium would increase O c. The number of meiotic recombination events would decrease and linkage disequilibrium would decrease O d. The number of meiotic recombination events would increase and linkage disequilibrium would increasearrow_forwardSuppose researchers studied the first chromosome of a new species and mapped three genes of interest, indicated as a, b, and c. A three‑factor cross was performed and the number of gametes formed from the F2 generation was recorded in a table. Note that the order of genes in the table is arbitrary. Calculate the recombination frequencies for each given gene pair in map units. ?+ ?+ ?+ ? ? ? ? ?+ ?+ ?+ ? ? ? ?+ ? ?+ ? ?+ ? ? ?+ ?+ ?+ ? 173 176 35 33 11 10 3 1 After completing the gene mapping, the researchers treated individuals to induce inversions in the chromosomes. After treatment, another three‑factor cross was performed and the number of gametes formed from the F2 generation was recorded in a second table. Note that the order of genes in the table is arbitrary. ?+ ?+ ?+ ? ? ? ? ?+ ?+ ?+ ? ? ? ?+ ? ?+ ? ?+ ? ? ?+ ?+ ?+ ? 188 185 24 26 1 0 49 46 Calculate the recombination frequencies for each given gene pair in map units.arrow_forwardWhat are characteristics of two loci being in linkage disequilibrium? O a. The two loci are located on different chromosomes. O b. There is a random association between a chromosome's genotype at one locus compared to another locus. O c. The coefficient of linkage disequilibrium is greater than zero. O d. The genotype on a chromosome for a given locus is independent of other genotypes at other loci on the same chromosome.arrow_forward
- Of the three outcomes of hybridization (fusion, stability, and reinforcement), which of them will result in the continued generation of interspecies hybrids? Explain.arrow_forwardA. What is the wild progenitor of maize and where is it found? B. George Beadle concluded that this plant was the likely ancestor of maize (corn) even though the two plants appear very different. What evidence did Dr. Beadle collect that led to his conclusion? C. How long ago was maize domesticated and what evidence was utilized to determine this? D. Dr. Doebley and his team compared the DNA sequence of maize to that of a number of teosinte varieties from throughout Mexico. What did their analysis reveal?arrow_forwardIn the lab, you discover two yeast haploid mutants that cannot produce arginine. You cross them together and the resulting diploid produces arginine. If producing arginine is the wild type phenotype, what can you definitively conclude? A.The haploid strains have identical mutations in the same genes. B.The haploid strains have identical mutations in different genes. C.The haploid strains have mutations in different genes. D.The haploid strains have mutations in the same gene. E.The haploid strains must belong to the complementation group encoding the first enzyme in the biosynthetic pathway.arrow_forward
- How would one explain a testcross involving F1 dihybrid flies in which more parental-type offspring than recombinant-type offspring are produced? Group of answer choices A. The testcross was improperly performed B. The two genes are linked C. Both of the characters are controlled by more than one gene D. The two genes are linked but on different chromosomes E. Recombination did not occur in the cell during meiosisarrow_forwardWhat is interspecific hybridization. Give an example?arrow_forwardSpecies I has 2 n = 8 chromosomes and species II has 2 n = 14 chromosomes. What would the expected chromosome numbers be in individuals with the following chromosome mutations? Give all possible answers. a. Allotriploidy including species I and II b. Autotetraploidy in species II c. Trisomy in species I d. Monosomy in species II e. Tetrasomy in species I f. Allotetraploidy including species I and IIarrow_forward
- Assume you are studying development in two species of iguana. You determine that a certain gene, "SPN2" turns on and off at different times in the two different species. The difference in timing leads to a different body length between the two iguana species. This phenomenon is an example of which of the following terms? a. Punctuated Equilibrium b. Pleiotropy c. Gene duplication d. Heterochronyarrow_forwardYou are interested if whether several genes of a certain species of beetle assort independently. So, you conduct several generations of matings, and after you have collected all your data, you are ready to analyze your results. You conduct a Chi2 test to test your hypothesis. You have 6 groups and calculate a Chi? = 13.22. Given that the critical value at 0.05 level of %3D significance = 11.07 at df = 5, %3D (A) State your null hypothesis. (B) Should you accept or reject your null hypothesis? (C) Why did you arrive your decision in (B)?arrow_forwarda) You are studying cushion plants in New Zealand: the wild-type cushion plan has a wide canopy. You obtain eight cushion plants that all have narrow canopies caused by a single autosomal recessive mutation. To determine how many genes are defined by these mutations, you mate the plants together and get the results shown in the complementation table below. The “–“ represents plants with narrow canopies and the “+” represents wide canopies. What will the offspring of a cross between plants A and F look like? b) Based on the above, how many different genes are defined by the 8 mutant strains?arrow_forward
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genetic recombination strategies of bacteria CONJUGATION, TRANSDUCTION AND TRANSFORMATION; Author: Scientist Cindy;https://www.youtube.com/watch?v=_Va8FZJEl9A;License: Standard youtube license