n a series of two-point map crosses involving four genes the following recombinant (single crossover) frequencies...
n a series of two-point map crosses involving four genes the following recombinant (single crossover) frequencies were observed.
A-D 30
C-B 25
D-B 15
A-C 40
D-C 10
A-B 15
What is the order of the genes if “A” is near one end?
Homework Answers
The recombination frequency is directly proportional to distance between two genes. Hre recombination frequency is highest (40) between A and C gene. So two terminal genes are A and C. Lowest recombination frequency is between D and C. So D is adjacent to C gene. By observing other recombiation frequency it is evident that the correct order of the genes is
A ------B........D...C
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n a series of two-point map crosses involving four genes the
following recombinant (single crossover) frequencies...
In a series of two-point map crosses involving five genes located on chromosome II in Drosophila,...
In a series of two-point map crosses involving five genes located on chromosome II in Drosophila, the following recombinant (single-crossover) frequencies were observed: If the ado gene is present near the end of chromosome II match the relative position of the other genes.
In a series of two-point map crosses involving five genes located on chromosome II in Drosophila,...
In a series of two-point map crosses involving five genes located on chromosome II in Drosophila, the following recombinant (single-crossover) frequencies were observed: pr-vg 20 vg-b 5 vg-c 30 adp-c 5 adp-b 40 adp-pr 15 pr-c 10 pr-b 25 c-b 35 If the adp gene is present near the end of chromosome II match the relative position of the other genes. Please explain how you got the answer - A. B. C....
The data below is from a series of two-point crosses. Use the recombination frequencies to construct...
The data below is from a series of two-point crosses. Use the recombination frequencies to construct a genetic map of all three genes. pr – adp 21% pr – vg 29% vg – adp 8% A fourth gene, cv, is found to have 4% recombination when tested with pr. Next you plan to test cv and adp. Predict the outcome of the cross between cv and adp.
genetics-please show all work 8. (9 pts) A series of two-point crosses were carried out among...
genetics-please show all work
8. (9 pts) A series of two-point crosses were carried out among six loci (a, b, c, d, e and f), producing the following recombination frequencies. The six loci map to three different linkage groups. Map the six loci, showing their linkage groups (you can use a single line for each linkage group), the order of the loci in each linkage group, and the distances between the loci of each group. If there is only one...
SO/ do no 2. A series of 2-point crosses were carried out among 7 loci (a, b, c, d, e, f, and g. producing the following recombination frequencies. Map the 7 loci, showing their linkage groups, t...
SO/ do no 2. A series of 2-point crosses were carried out among 7 loci (a, b, c, d, e, f, and g. producing the following recombination frequencies. Map the 7 loci, showing their linkage groups, the order of the loci in each linkage group, and distances berween the loci of each group. () | % Reco Loci % Recombination 50 26 50 50 50 50 a- b a-c a-d a- e 50 50 12 50 50 4 10 50...
3. In a series of mapping experiments, the recombination frequencies for four different linked genes of...
3. In a series of mapping experiments, the recombination frequencies for four different linked genes of Drosophila were determined as shown in the figure below. Wildtype (dominant) is flat wings, medium leg length, brown abdomen, and medium bristle length. w curled wings 1 short legs a - red abdomen b long bristles g23 O a 12 11 0 b 20 3 8 0 w a b The numbers in the boxes are the recombinatior frequencies in between the genes (in...
1. A genetic cross in which the inheritance of two traits is observed is called a...
1. A genetic cross in which the inheritance of two traits is observed is called a A) Dihybrid cross. B) Monohybrid cross C) Backeross D) Testcross 2. For single crossovers, the frequency of recombinant gametes is half the frequency of crossing over because A) A testeross between a homozygous and heterozygote produces 1/2 heterozygous and 1/2 homozygous progeny. B) The frequency of recombination is always 50%. C) Each crossover takes place between only two of the four chromatids of a...
Problem I A series of two-point crosses were carried out among seven loci (a, b, c,...
Problem I A series of two-point crosses were carried out among seven loci (a, b, c, d, e, f, and g), producing the following recombination frequencies. Map the seven loci, showing their linkage groups, the order of the loci in each linkage group, and distances between the loci of each linkage group. Loci % Recombination Loci % Recombination a - b 50 c - d 50 a - c 50 c - e 26 a - d 12 c -...
Provide an explanation Although historically 3 point test crosses were used to map only morphological traits,...
Provide an explanation
Although historically 3 point test crosses were used to map only morphological traits, now they can be used to map DNA traits such as a SNP or a restriction site polymorphism. Here is such data for three DNA traits (3 loci for which there are two alleles of each -- but as usual in linkage work we don't care about the phenotypes as much as using them to produce our map): Genotype Number Observed a, b, c...
You are provided the following recombination frequencies for four traits determined by four genes on one...
You are provided the following recombination frequencies for four traits determined by four genes on one chromosome in corn (Zea mays). Based on this information, organize the genes in a way that represents their arrangement on the chromosome. dotted—yellow seedlings 7.3 mu bronze color—yellow seedlings 25 mu dotted—kernel color 26 mu kernel color—bronze color 4.8 mu dotted—bronze color 31.1 mu (3 pts) You are doing a genetics experiment with fruit flies. In the “P” generation, you cross two true-breeding flies....
In a series of two-point map crosses involving five genes located on chromosome II in Drosophila, the following recombinant (single-crossover) frequencies were observed: If the ado gene is present near the end of chromosome II match the relative position of the other genes.
genetics-please show all work
8. (9 pts) A series of two-point crosses were carried out among six loci (a, b, c, d, e and f), producing the following recombination frequencies. The six loci map to three different linkage groups. Map the six loci, showing their linkage groups (you can use a single line for each linkage group), the order of the loci in each linkage group, and the distances between the loci of each group. If there is only one...
SO/ do no 2. A series of 2-point crosses were carried out among 7 loci (a, b, c, d, e, f, and g. producing the following recombination frequencies. Map the 7 loci, showing their linkage groups, the order of the loci in each linkage group, and distances berween the loci of each group. () | % Reco Loci % Recombination 50 26 50 50 50 50 a- b a-c a-d a- e 50 50 12 50 50 4 10 50...
3. In a series of mapping experiments, the recombination frequencies for four different linked genes of Drosophila were determined as shown in the figure below. Wildtype (dominant) is flat wings, medium leg length, brown abdomen, and medium bristle length. w curled wings 1 short legs a - red abdomen b long bristles g23 O a 12 11 0 b 20 3 8 0 w a b The numbers in the boxes are the recombinatior frequencies in between the genes (in...
1. A genetic cross in which the inheritance of two traits is observed is called a A) Dihybrid cross. B) Monohybrid cross C) Backeross D) Testcross 2. For single crossovers, the frequency of recombinant gametes is half the frequency of crossing over because A) A testeross between a homozygous and heterozygote produces 1/2 heterozygous and 1/2 homozygous progeny. B) The frequency of recombination is always 50%. C) Each crossover takes place between only two of the four chromatids of a...
Provide an explanation
Although historically 3 point test crosses were used to map only morphological traits, now they can be used to map DNA traits such as a SNP or a restriction site polymorphism. Here is such data for three DNA traits (3 loci for which there are two alleles of each -- but as usual in linkage work we don't care about the phenotypes as much as using them to produce our map): Genotype Number Observed a, b, c...
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