Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 9.4, Problem 1TYK
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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?
How do your observed values for generations 4, 5, 6, 7, and 8 compare with those of generations 1, 2, and 3? Do you observe any trend? How would you account for this trend? What phenomenon has just occurred?
Which condition(s) of the Hardy-Weinberg model was (were) violated by the exercise where the aa genotype was excluded from the population?
Differentiate genetic drift from genetic shift.
What is genotype frequency?
How do you get the genotype frequency? Give formula and cite example.
Chapter 9 Solutions
Principles of Biology
Ch. 9.1 - Look ahead to Figure 17.10. How does bacterial...Ch. 9.1 - Prob. 1TYKCh. 9.2 - Prob. 1CCCh. 9.2 - Prob. 2CCCh. 9.2 - Prob. 3CCCh. 9.2 - A nucleotide composed of deoxyribose, phosphate,...Ch. 9.2 - Prob. 2TYKCh. 9.2 - Prob. 3TYKCh. 9.3 - Prob. 1TYKCh. 9.3 - To determine the structure of DNA, Watson and...
Ch. 9.4 - Prob. 1CCCh. 9.4 - Prob. 1TYKCh. 9.4 - Prob. 2TYKCh. 9.5 - Prob. 1CCCh. 9.5 - Prob. 1TYKCh. 9.5 - Prob. 2TYKCh. 9.5 - Prob. 3TYKCh. 9.6 - Prob. 1CCCh. 9.6 - A nucleosome is composed of 146 bp or 147 bp of...Ch. 9.6 - After they have replicated and become compacted in...Ch. 9.6 - Prob. 1BCCh. 9.6 - Which of the following is the correct order for...Ch. 9 - What is/are the main component(s) of chromosomes?...Ch. 9 - Prob. 2TYCh. 9 - Prob. 3TYCh. 9 - Prob. 4TYCh. 9 - Of the following statements, which is correct when...Ch. 9 - Prob. 6TYCh. 9 - Prob. 7TYCh. 9 - Prob. 8TYCh. 9 - Prob. 9TYCh. 9 - The conversion of euchromatin into heterochromatin...Ch. 9 - What are the four criteria that the genetic...Ch. 9 - What are the key features of DNA that allow it to...Ch. 9 - PRINCIPLES A principle of bioloy is that structure...Ch. 9 - Prob. 1CBQCh. 9 - Prob. 2CBQ
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- What are factors which causes two hybrid populations to separate? Reinforcement Fusion Stabilityarrow_forwardA population of 30 individuals has a mutation that generates a new allele “a”. This new allele gives a nearly identical phenotype to the “old” allele “A”. What is the probability of fixation for “a”? What will be the average number of generations until fixation? How would these values change if the population contained 3000 individuals?arrow_forwardIf the frequency of “A” is 0.9, and the frequency of “a” is 0.1, and the mutation rate converting “A” to “a” is 10-5 – what will be the frequency of “a” after 10 generations? After 10,000 generations?arrow_forward
- C1C1 C1C2 C2C2 D1D1 D1D2 D2D2 Sand 0.07 0.39 0.54 0.25 0.5 0.25 Land 0.18 0.49 0.33 0.06 0.22 0.72 Lets believe that there is an effective pop. size with 1000 individs in the population of sand. What do you predict will be the generations it will take for the C locus heterozygosity to get to the 1/2 of the recent or in other words current value?arrow_forwardGive typing answer with explanation and conclusion A population of snails has a deleterious mutation (m) with a mutation rate of 0.01. Heterozygotes with this mutation will show the deleterious phenotype and have a selection coefficient of 0.4. If allele frequencies in the population are M = 0.99 and m = 0.01, will the number of mutant alleles in the next generation increase/decrease/remain the same?arrow_forwardConsider a situation where F1 is backcrossed with one of its parental lineage and we obtained A1H1/A2H2 : A2H1/A2H2 : A2H2/A2/H2: A1H2/A2H2 = 295 : 186 : 310 : 209, where A1 and A2 are alleles at a locus and H1 and H2 are alleles at the other locus. What is the recombination (genetic) distance between the two loci in centimorgans? A. 8.9 B. 22.5 C. 18.4 D. 50 E. 39.5arrow_forward
- Two SNPs are located in the short arm of chromosome 12. SNP1 has allele frequencies of 60% T and 40% C, and SNP2 has allele frequencies of 40% A and 60% G. What is the frequency of the haplotype T-G in a population if the two SNPs are in absolute linkage disequilibrium and if they are in linkage equilibrium?arrow_forwardWhat are factors which causes two hybrid populations come back together? Reinforcement Fusion Stabilityarrow_forwardDo the table and the graph conform to the Hardy-Weinberg equilibrium? Explain Generation AA Aa aa A a 0 0.250 0.500 0.250 0.500 0.500 1 0.265 0.480 0.255 0.505 0.495 2 0.255 0.480 0.265 0.495 0.505 3 0.255 0.490 0.255 0.500 0.500arrow_forward
- Applying the Hardy-Weinberg equilibrium. In a population of flowers, the following color distribution was noted: 36% red (RR), 48% brown-red (Rr), and 16% fuschia (rr). What will be the distribution of genotypes in the next generation?arrow_forwardWhat type of selection does this graph show?arrow_forwardFor a simulated population in AlleleA1 to be in Hardy-Weinberg equilibrium, the mutation rate would need to be set at: A. 0. B. 0.1. C. 0.01. D. 0.001arrow_forward
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