23. Map out the correct chromosome map for the following genes: (please draw out) X-Z =...
23. Map out the correct chromosome map for the following genes: (please draw out)
X-Z = 18% X-G = 35% Z-Y = 27% Z-G = 53% X-Y = 45%
A. Y-Z-X-G
B. X-Z-G-Y
C. Y-X-Z-G
D. Z-G-Y-X
Homework Answers
Answer: Option 1 is correct
Explanation:
Recombination frequency is directly proportional to the distance
between two genes.
Greater the distance between two genes, there is a greater chance
of recombination between them.
Given information:
X-Z = 18% X-G = 35% Z-Y = 27% Z-G = 53% X-Y = 45%
From the given data, linkage map can be constructed as
Y--(27%)--Z--(18%)--X--(35%)--G
Add Answer to:
23. Map out the
correct chromosome map for the following genes: (please draw
out)
X-Z =...
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.
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?...
In a series of two-point map crosses involving five genes located on chromosome II in Drosophila,...
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Please explain step by step... thank you! In order to determine the overall chromosome map for...
Please explain step by step... thank you!
In order to determine the overall chromosome map for E coli, three Hfr strains were obtained from a protrophic but erythromycin resistant F+ ancestor. The start times of transfer during conjugation matings with F- strains carrying auxotrophic, fermentation, and erythromycin- sensitivity markers were determined for each Hfr strain, as listed. A. Using the times for transfer of each marker, draw a unified chromosome map of E coli, showing the order and relative distances...
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...
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%
4. There are three genes on the X-chromosome in drosophila, yellow (y), white (w), and cut...
4. There are three genes on the X-chromosome in drosophila, yellow (y), white (w), and cut (ct). A yellow-bodied, white-eyed, and a homozygous normal winged female fly was crossed to a male with wild type body, wild type eyes, and cut wings. The Fi females were wild type for all three traits, while the Fi males had yellow bodies, white eyes, normal wings. The Fi females were crossed to yellow bodied, white eyed, cut wing males. The resulting F2 progeny...
1) given the following sequence of genes on a chromosome, determine what change in chromosome structure...
1) given the following sequence of genes on a chromosome, determine what change in chromosome structure occurred. the asterisk indicates the centromere before: A B C D * E F G H after: A C D * E F G H a) inversion b) gene duplication c) terminal deletion d) interstitial deletion 2) given the following sequence of genes on a chromosome, determine what change in chromosome structure occurred. the asterisk indicates the centromere before: A B C D *...
The B and N genes are 25 map units apart on a chromosome. a) Following a...
The B and N genes are 25 map units apart on a chromosome. a) Following a dihybrid testcross, how many offspring of 250 would you expect to display a recombinant phenotype? a) If you performed a dihybrid testcross, with a cis dihybrid, what would be the genotypes of both recombinant offspring phenotypic classes?
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.
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?...
Please explain step by step... thank you!
In order to determine the overall chromosome map for E coli, three Hfr strains were obtained from a protrophic but erythromycin resistant F+ ancestor. The start times of transfer during conjugation matings with F- strains carrying auxotrophic, fermentation, and erythromycin- sensitivity markers were determined for each Hfr strain, as listed. A. Using the times for transfer of each marker, draw a unified chromosome map of E coli, showing the order and relative distances...
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%
4. There are three genes on the X-chromosome in drosophila, yellow (y), white (w), and cut (ct). A yellow-bodied, white-eyed, and a homozygous normal winged female fly was crossed to a male with wild type body, wild type eyes, and cut wings. The Fi females were wild type for all three traits, while the Fi males had yellow bodies, white eyes, normal wings. The Fi females were crossed to yellow bodied, white eyed, cut wing males. The resulting F2 progeny...
The B and N genes are 25 map units apart on a chromosome. a) Following a dihybrid testcross, how many offspring of 250 would you expect to display a recombinant phenotype? a) If you performed a dihybrid testcross, with a cis dihybrid, what would be the genotypes of both recombinant offspring phenotypic classes?
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