Excluding chromosome aberrations, the order of genes on a genetic map of a chromosome is the...
Excluding chromosome aberrations, the order of genes on a genetic map of a chromosome is the same as on its physical map. Why are the distances different?
Homework Answers
Genetic mapping is mapped by the linkage recombination and the number of progeny produced, that allow the researcher to know the estimate distance between genes.
Gene mapping can also be mapped by the RFLP process in which two or more molecular marker are taken into consideration for mapping distance between gene.
Physical map include breaking of the whole genome by sonification and sequence the small pieces of DNA and these fragment attach with contiguous DNA and help in making a physical map.
In physical map the heterochromatin regions are also present while in gene mapping we can not predict the heterochromatin regions.
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Excluding chromosome aberrations, the order of genes on a
genetic map of a chromosome is the...
Question #1: Thomas Hunt Morgan used genetic mapping to map out genes on the chromosomes. He...
Question #1: Thomas Hunt Morgan used genetic mapping to map out genes on the chromosomes. He found that alleles that are not genetically linked, can still be on the same chromosome. Alleles A and Z are not genetically linked (recombination frequency is 50%) If the recombination frequency between different alleles are: AZ: 50% G-Z: 50% A-G: 8% T-D: 24% G-T: 39% TZ: 50% A-T: 47% DZ: 25% A. Are A and Z on the same chromosome? Why or why not?...
When determining map distance between two genes that are far apart on the same chromosome, it...
When determining map distance between two genes that are far apart on the same chromosome, it is most accurate to add up the recombination frequencies of genes between the two outside genes because The recombination frequency between the two outside genes will be an over-estimate of the actual distance due to double cross-overs By adding up the smaller distances you can account for MANY of the double cross-overs that occurred between the two closest genes. By adding up the smaller...
The following map indicates the order of three genes (A, B, and C) on a chromosome...
The following map indicates the order of three genes (A, B, and C) on a chromosome and the number of map units between adjacent gene pairs. What is the expected frequency of the gametes ABC and abc produced by an individual of genotype AbC//aBc. (Assume no interference.) A---->8 m.u.--->B --->24 m.u.--->C 0 69.92% O 0.96% 06.08% 1.92% 022.1%
Below is a map of the Drosophila melanogaster X chromosome, giving the distances between adjacent genes...
Below is a map of the Drosophila melanogaster X
chromosome, giving the distances between adjacent genes in cM.
Suppose that a female is heterozygous for an inversion of the
exact entire region from v to wy.
She is also heterozygous for all the genes shown in the map, and
is test-crossed.
What percentage of her progeny will be recombinants between the
following gene pairs?
a) wy and g ___________
b) v and g _____________
6. The table below gives the recombination rates of genes located on the same chromosome. Genes...
6. The table below gives the recombination rates of genes located on the same chromosome. Genes Rate of recombination a,b 50% ac 15% ad 38% a,e 8% b,c 50% b,d 13% be 50% cd 50% ce 7% d, e 45% Draw the genetic map of this chromosome.
5. Deletions can be used to map genes along a chromosome. In order to do this...
5. Deletions can be used to map genes along a chromosome. In order to do this a series of crosses in which one parent is homozygous for a mutant allele is crossed with the other parent that is homozygous for a partial deletion of the region. The progeny are scored to determine whether they have the mutant phenotype ("m") or the wild-type phenotype ("+"). If the mutant allele falls within the deletion it will have the "m" phenotype, if it...
Suppose the F and G genes are on the same chromosome and separated by 75 map...
Suppose the F and G genes are on the same chromosome and separated by 75 map units What fraction of the progeny from the cross FG/fg times fg/fg are expected to be Fg/fg? 12.5% 50% 25% 37.5% Two genes cannot be separated by 75 map units.
ing genetic map: 2. 3 > chromosome 3: 5 N. 35 me chromosome 7: >0 20...
ing genetic map: 2. 3 > chromosome 3: 5 N. 35 me chromosome 7: >0 20 mu <a 15E ASR 7 8 9 10 Questions 1-6 are to be answered in order in the respective boxes below. Final answers must be entered online. (Your answer should be a number between 0 and 100 to two decimal places for example, one number as a final answer including or between "0.00" through "100.00"). Round to the nearest hundredths and do not include...
Which of these statements is incorrect? Syntenic genes are located on the same chromosome. Independent assortment...
Which of these statements is incorrect? Syntenic genes are located on the same chromosome. Independent assortment results in recombinant chromosomes. You can reliably predict the relative genetic distance from genes’ physical distance on a chromosome. Linked genes are always syntenic. What is the relative genetic distance between two linked genes if the recombination frequency is 0.49? 0.49 cM 4.9 cM 49 cM 490 cM What statement best explains the distortion in Mendelian ratios observed by Bateson & Punnett in 1905?...
Suppose the A and B genes are on the same chromosome but separated by 100 map...
Suppose the A and B genes are on the same chromosome but separated by 100 map units. What fraction of the progeny from the cross AB/ab x ab/ab would be AB/ab?
Question #1: Thomas Hunt Morgan used genetic mapping to map out genes on the chromosomes. He found that alleles that are not genetically linked, can still be on the same chromosome. Alleles A and Z are not genetically linked (recombination frequency is 50%) If the recombination frequency between different alleles are: AZ: 50% G-Z: 50% A-G: 8% T-D: 24% G-T: 39% TZ: 50% A-T: 47% DZ: 25% A. Are A and Z on the same chromosome? Why or why not?...
The following map indicates the order of three genes (A, B, and C) on a chromosome and the number of map units between adjacent gene pairs. What is the expected frequency of the gametes ABC and abc produced by an individual of genotype AbC//aBc. (Assume no interference.) A---->8 m.u.--->B --->24 m.u.--->C 0 69.92% O 0.96% 06.08% 1.92% 022.1%
Below is a map of the Drosophila melanogaster X
chromosome, giving the distances between adjacent genes in cM.
Suppose that a female is heterozygous for an inversion of the
exact entire region from v to wy.
She is also heterozygous for all the genes shown in the map, and
is test-crossed.
What percentage of her progeny will be recombinants between the
following gene pairs?
a) wy and g ___________
b) v and g _____________
6. The table below gives the recombination rates of genes located on the same chromosome. Genes Rate of recombination a,b 50% ac 15% ad 38% a,e 8% b,c 50% b,d 13% be 50% cd 50% ce 7% d, e 45% Draw the genetic map of this chromosome.
Suppose the F and G genes are on the same chromosome and separated by 75 map units What fraction of the progeny from the cross FG/fg times fg/fg are expected to be Fg/fg? 12.5% 50% 25% 37.5% Two genes cannot be separated by 75 map units.
ing genetic map: 2. 3 > chromosome 3: 5 N. 35 me chromosome 7: >0 20 mu <a 15E ASR 7 8 9 10 Questions 1-6 are to be answered in order in the respective boxes below. Final answers must be entered online. (Your answer should be a number between 0 and 100 to two decimal places for example, one number as a final answer including or between "0.00" through "100.00"). Round to the nearest hundredths and do not include...
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