Homework Answers
Parental: ABD
abd
Single cross over between genes D and B AbD
aBd
Double cross over ABd
abD
Single cross over between genes A and D Abd
aBD
Distance between genes A and D = 37+44+3+6
----------------- X100 = 9cM
1000
Distance between genes D and B = 43+48+3+6
---------------- 100 = 10cM
1000
interference = 1 -( observed DCO/expected DCO)
1-(3+6)/(0.1)(0.09) (1000)
1-9/9=0
complete chromosomal interference observed
I
Add Answer to:
By analyzing the gametes from a trihybrid fruit fly that is heterozygous for three linked genes...
2. Three genes and their mutations are found on the third chromosome in fruit fly Drosophila...
2. Three genes and their mutations are found on the third chromosome in fruit fly Drosophila melanogaster. Of these three genes, scarlet eyes (st) are recessive to red eyes (st"), cbony body color (eb) is recessive to gray body color (eb"), and spineless (ss), the st presence of small bristles, is recessive to normal bristles (ss). You eb SS were given a heterozygous fly (st'st eb'eb ss'ss) and were asked to eb ss design an experiment to map the distance...
number 8 D. ? 8. A female fruit fly is heterozygous for two genes, A and...
number 8
D. ? 8. A female fruit fly is heterozygous for two genes, A and B. Gene A is X-linked, Whereas gene B is not. If this female is mated to a male that is recessive for both genes, predict the frequency of progeny genotypes. Show your work. A. Identify parental genotypes B. Identify the gametes C. Perform the cross D. Calculate the frequencies:
Name: 5. A heterozygous trihybrid com plant is test crossed and the following progeny are produced....
Name: 5. A heterozygous trihybrid com plant is test crossed and the following progeny are produced. The mutant traits-booster (b), silkless (s), liguleless (1) - are recessive to their wild-type (+) alternatives. (Hint: The wild-type alternatives (+) for each of the three mutant traits can be named B, S, and L, respectively.) (6 points) Note: This is a three point cross. Show all your work to get full credit. You will get partial credit for any work that is correct...
TABLE 2 e-Wa C-Ws Knob Knobless Knob Knobless Knob Knobless Knob Knobless 12 34 0 Reorganize...
TABLE 2 e-Wa C-Ws Knob Knobless Knob Knobless Knob Knobless Knob Knobless 12 34 0 Reorganize the data into the table below that will look more like the tables found in your textbook. Where K-Knob and k-Knobless; C- colored, c colorless; W-Waxy, Female Gametes Observed Identify Rec Rec for Rec for se that are for W&c K&W Parental, K & C ScO, DCO K-C-w k-c-W K-C-W K-C-w K-c-W k-C-w K-c-w k-C-W TOTAI RF for K & C RF for C&W...
In Drosophila, a fully hetero sophila, a fully heterozygous female with the X-linked recessive genes a...
In Drosophila, a fully hetero sophila, a fully heterozygous female with the X-linked recessive genes a bande not necessarily in that order on the chromosome) was mated to ma c(not necessarily in that order on the chromosom in that order on the chromosome). The offspring occurred in the following phenotypic ratios: Phenotypes Numbers wildtype ac,b 426 428 cb b, a c, a Total 1000 a) What is the arrangement among the genes? Which gene is in the middle? b) What...
6. Fine spines (s), smooth fruit (tu), and uniform color (u) are three recessive traits in...
6. Fine spines (s), smooth fruit (tu), and uniform color (u) are three recessive traits in cucumbers. These genes are linked on the same chromosome. A cucumber plant heterozygous for all three traits is used in the testcross, and the following offspring are obtained: SU CCCCCC Reuuuna a) Determine the order of the genes on the chromosome. b) Calculate the map distances between the genes. c) Calculate the coefficient of coincidence and the interference among the genes. total: 230
Question 5 (14 marks) The allele cn gives fruit flies cinnabar eyes, whereas the allele cn...
Question 5 (14 marks) The allele cn gives fruit flies cinnabar eyes, whereas the allele cn gives red, the wild-type phenotype. The allele wx of a separate allele gives waxy wings, and wx gives non-waxy wings (wild-type). The allele b of a third gene gives fruit flies a black body, whereas the allele b gives a brown (wild-type) body colour. A geneticist knows these three genes are on the same chromosome, but does not know what order the genes are...
43. Genes a and b are X-linked and are located 7 mu apart on the X...
43. Genes a and b are X-linked and are located 7 mu apart on the X chromosome of Drosophila. A female of genotype a+ b/a b+ is mated with a wild-type (a+b+/Y). a. What is the probability that one of her sons will be either a+b+ or a b+ in phenotype? b. What is the probability that one of her daughters will be a+b+ in phenotype? 44. Three recessive autosomal mutations in Drosophila: a versus wild-type A. b versus B,...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart,...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart, If a plant with the genotype sh bz/ sh bz is selfed, what percentage of the progeny will be double recessive? 37. If the recombination frequency between the linked autosomal genes A and B in Drosophila is 15 percent, what phenotypic frequencies would you expect from a cross AB/ab females x AB/ab males? (There is no crossing over in Drosophila males). 38. In the...
31. ANALYSIS Priscilla Lane and Margaret Green studied the linkage relations of three genes affecting coat...
31. ANALYSIS Priscilla Lane and Margaret Green studied the linkage relations of three genes affecting coat color in mice: mahogany (mg), agouti (a), and ragged (Rg). They carried out a series of three-point crosses, mating mice that were heterozygous at all three loci with mice that were homozygous for the recessive alleles at these loci (P W. Lane and M. C. Green. 1960. Journal of Heredity 51:228-230). The following table lists the results of the testcrosses. Number Phenotype Rg 1...
2. Three genes and their mutations are found on the third chromosome in fruit fly Drosophila melanogaster. Of these three genes, scarlet eyes (st) are recessive to red eyes (st"), cbony body color (eb) is recessive to gray body color (eb"), and spineless (ss), the st presence of small bristles, is recessive to normal bristles (ss). You eb SS were given a heterozygous fly (st'st eb'eb ss'ss) and were asked to eb ss design an experiment to map the distance...
number 8
D. ? 8. A female fruit fly is heterozygous for two genes, A and B. Gene A is X-linked, Whereas gene B is not. If this female is mated to a male that is recessive for both genes, predict the frequency of progeny genotypes. Show your work. A. Identify parental genotypes B. Identify the gametes C. Perform the cross D. Calculate the frequencies:
Name: 5. A heterozygous trihybrid com plant is test crossed and the following progeny are produced. The mutant traits-booster (b), silkless (s), liguleless (1) - are recessive to their wild-type (+) alternatives. (Hint: The wild-type alternatives (+) for each of the three mutant traits can be named B, S, and L, respectively.) (6 points) Note: This is a three point cross. Show all your work to get full credit. You will get partial credit for any work that is correct...
TABLE 2 e-Wa C-Ws Knob Knobless Knob Knobless Knob Knobless Knob Knobless 12 34 0 Reorganize the data into the table below that will look more like the tables found in your textbook. Where K-Knob and k-Knobless; C- colored, c colorless; W-Waxy, Female Gametes Observed Identify Rec Rec for Rec for se that are for W&c K&W Parental, K & C ScO, DCO K-C-w k-c-W K-C-W K-C-w K-c-W k-C-w K-c-w k-C-W TOTAI RF for K & C RF for C&W...
In Drosophila, a fully hetero sophila, a fully heterozygous female with the X-linked recessive genes a bande not necessarily in that order on the chromosome) was mated to ma c(not necessarily in that order on the chromosom in that order on the chromosome). The offspring occurred in the following phenotypic ratios: Phenotypes Numbers wildtype ac,b 426 428 cb b, a c, a Total 1000 a) What is the arrangement among the genes? Which gene is in the middle? b) What...
6. Fine spines (s), smooth fruit (tu), and uniform color (u) are three recessive traits in cucumbers. These genes are linked on the same chromosome. A cucumber plant heterozygous for all three traits is used in the testcross, and the following offspring are obtained: SU CCCCCC Reuuuna a) Determine the order of the genes on the chromosome. b) Calculate the map distances between the genes. c) Calculate the coefficient of coincidence and the interference among the genes. total: 230
Question 5 (14 marks) The allele cn gives fruit flies cinnabar eyes, whereas the allele cn gives red, the wild-type phenotype. The allele wx of a separate allele gives waxy wings, and wx gives non-waxy wings (wild-type). The allele b of a third gene gives fruit flies a black body, whereas the allele b gives a brown (wild-type) body colour. A geneticist knows these three genes are on the same chromosome, but does not know what order the genes are...
43. Genes a and b are X-linked and are located 7 mu apart on the X chromosome of Drosophila. A female of genotype a+ b/a b+ is mated with a wild-type (a+b+/Y). a. What is the probability that one of her sons will be either a+b+ or a b+ in phenotype? b. What is the probability that one of her daughters will be a+b+ in phenotype? 44. Three recessive autosomal mutations in Drosophila: a versus wild-type A. b versus B,...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart, If a plant with the genotype sh bz/ sh bz is selfed, what percentage of the progeny will be double recessive? 37. If the recombination frequency between the linked autosomal genes A and B in Drosophila is 15 percent, what phenotypic frequencies would you expect from a cross AB/ab females x AB/ab males? (There is no crossing over in Drosophila males). 38. In the...
31. ANALYSIS Priscilla Lane and Margaret Green studied the linkage relations of three genes affecting coat color in mice: mahogany (mg), agouti (a), and ragged (Rg). They carried out a series of three-point crosses, mating mice that were heterozygous at all three loci with mice that were homozygous for the recessive alleles at these loci (P W. Lane and M. C. Green. 1960. Journal of Heredity 51:228-230). The following table lists the results of the testcrosses. Number Phenotype Rg 1...
Most questions answered within 3 hours.
-
An aqueous solution of perchloric acid is
standardized by titration with a 0.101 M solution
of...
asked 4 minutes ago -
Huckster Corporation purchased land on January 1, 20X1, for
$24,000. On June 10, 20X4, it sold...
asked 1 minute ago -
A 2400-kg airplane pulls two gliders, the first of mass 330 kg
and the second of...
asked 13 minutes ago -
When I have a regression equation such as Y = beta 0 + beta 1 X...
asked 17 minutes ago -
1) Describe how the firm, Google is organized. a. Note the
formal structure (Organizational Charts); also...
asked 23 minutes ago -
Q 1 Give a numerical example of non routine decision,
Determine the relevant costs for this...
asked 24 minutes ago -
A car moving at 87 km/h has tires of 76 cm diameter. If the
vehicle comes...
asked 40 minutes ago -
Most of the galaxies in the universe are observed to be moving
away from Earth. Suppose...
asked 42 minutes ago -
Paired research designs, also sometimes referred to as repeated
measures designs, are associated with some common...
asked 41 minutes ago -
You working as a clinical engineer dealing with
autoclaves, xrays and life care machines, in what...
asked 44 minutes ago -
Explain in detail (not just enumerate) each of Koch’s
postulates to determine the etiology of a...
asked 56 minutes ago -
Assume ABC Company has asked you to not only prepare their 2017
year-end Balance Sheet but...
asked 54 minutes ago