Homework Answers
1.This is a three point cross.
2. Middle gene is the 'pr' gene.
3. Distance between the three genes is --
4. Interference :
Interference = 1- C.O. C = 1-0.79 = 0.21
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A standard three-point mapping is conducted for recessive mutations in autosomal genes purple eye (pr), curved...
Practice 7.1. Cross a female fly with the eyeless mutation (a) for eye shape but normal...
Practice 7.1. Cross a female fly with the eyeless mutation (a) for eye shape but normal bristle (b+) to a male fly with wild type eye shape (a+) with shaven bristles (b). Both of these genes are located on Mate a female fly with mutant traits of a black body (c), bristle (b), and wing veins (v) to a wild- type male (normal body color (c+), bristle (b+), and wing size (v+)]. These three alleles are located on chromosome II...
You are mapping three recessive autosomal linked genes in Drosphila: claret eye, curly wings and fluted...
You are mapping three recessive autosomal linked genes in Drosphila: claret eye, curly wings and fluted wings. You cross a triple heterozygous female to a homozygous claret, curly, fluted male and count the 1000 offspring with these results. Phenotype observed number fluted 26 claret 173 curled 298 fluted, claret 302 fluted, curled 167 claret, curled 24 fluted, claret, curled 4 wild type 6 Based on the information above, what is the distance between all three genes? Group of answer choices...
Genetic Linkage The six genes listed below are all located on Chromosome 2 of Drosophila melanogaster....
Genetic Linkage The six genes listed below are all located on Chromosome 2 of Drosophila melanogaster. Your goal is to construct a genetic map of Chromosome 2. That is, determine the order of these genes along chromosome 2 and the map distance in centimorgans between each gene. To complete this task, you will be given the results of a variety of two-point test crosses involving these genes. For each test cross you may assume that the female is heterozygous and...
S. Imagine that you set up a three-point mapping crus to determine the orier or three...
S. Imagine that you set up a three-point mapping crus to determine the orier or three (linked genes. You have recessive mutations available for all three genes: Follow (1) 1hite (r) and echinus (ec). A heterozygous F, Drosophila female is crossed to a hemizygous mutant male. The observed numbers and phenotypes of Fz are as follows: 4685 yellow, white, echinus 4759 wild type 80 yellow 70 white, echinus 193 yellow, white 207 echinus 3 yellow, echinus 3 white Based on...
Question 3. From text book Male Drosophila expressing the autosomal recessive mutations sc (scute...
Question 3. From text book Male Drosophila expressing the autosomal recessive mutations sc (scute), ec (echinus), cv (crossveinless) and b (black) were crossed to phenotypically wild- type females, and the 3288 progeny listed were obtained. (Only mutant traits are noted.) 653 black, scute, echinus, crossveinless 670 scute, echinus, crossveinless 675 ild type 655 black 71 black, scute 73 scute 73 black, echinus, crossveinless 74 echinus, crossveinless 87 black, scute, echinus 84 scute, echinus 86 black, crossveinless 83 crossveinless 1 lack,...
the fruit fly, Drosophila melanogaster, an allele (v) of the gene vermillion gives flies purple eyes...
the fruit fly, Drosophila melanogaster, an allele (v) of the gene vermillion gives flies purple eyes and is recessive to the wildtype red eye color (v+). An allele y of the yellow gene, gives flies a yellow body color compared to the dominant brown body color (yt). A heterozygous females for the two different mutations is test-crossed with mutant (i.e., homozygous recessive) males. The phenotypes of the progeny of this cross and their corresponding numbers are given below Yellow body,...
Drosophila T a heterozyg chromosome 2), and hot tamale Cht). 301 307 46 36 ap ht...
Drosophila
T a heterozyg chromosome 2), and hot tamale Cht). 301 307 46 36 ap ht + 41 ap + b ht h 리)5 4. Black body (b/b), curved wing(c/e), and purple eye color (pr/pr) are recessive traits known to be on chromosome 2 in Drosophila. A testcross of a heterozygous female for all 3 genes was crossed to a black bodied, curved wing. purple eyed male fly and yielded the following progeny Phenotype class Number Type Phenotype class Number...
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...
Please show work. 2. You mate a female fly with a black body, purple eyes, and...
Please show work.
2. You mate a female fly with a black body, purple eyes, and vestigial wing size to a wild- type male. These three alleles are located on chromosome II (autosome) in Drosophila. You testcross one of the Fi females to a male with all three mutations and record the results from the testcross in following table. Phenotype # of each phenotype Body color eye color wing size red red red red 900 le normal vestigial 90 50...
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...
Practice 7.1. Cross a female fly with the eyeless mutation (a) for eye shape but normal bristle (b+) to a male fly with wild type eye shape (a+) with shaven bristles (b). Both of these genes are located on Mate a female fly with mutant traits of a black body (c), bristle (b), and wing veins (v) to a wild- type male (normal body color (c+), bristle (b+), and wing size (v+)]. These three alleles are located on chromosome II...
Genetic Linkage The six genes listed below are all located on Chromosome 2 of Drosophila melanogaster. Your goal is to construct a genetic map of Chromosome 2. That is, determine the order of these genes along chromosome 2 and the map distance in centimorgans between each gene. To complete this task, you will be given the results of a variety of two-point test crosses involving these genes. For each test cross you may assume that the female is heterozygous and...
S. Imagine that you set up a three-point mapping crus to determine the orier or three (linked genes. You have recessive mutations available for all three genes: Follow (1) 1hite (r) and echinus (ec). A heterozygous F, Drosophila female is crossed to a hemizygous mutant male. The observed numbers and phenotypes of Fz are as follows: 4685 yellow, white, echinus 4759 wild type 80 yellow 70 white, echinus 193 yellow, white 207 echinus 3 yellow, echinus 3 white Based on...
Question 3. From text book Male Drosophila expressing the autosomal recessive mutations sc (scute), ec (echinus), cv (crossveinless) and b (black) were crossed to phenotypically wild- type females, and the 3288 progeny listed were obtained. (Only mutant traits are noted.) 653 black, scute, echinus, crossveinless 670 scute, echinus, crossveinless 675 ild type 655 black 71 black, scute 73 scute 73 black, echinus, crossveinless 74 echinus, crossveinless 87 black, scute, echinus 84 scute, echinus 86 black, crossveinless 83 crossveinless 1 lack,...
the fruit fly, Drosophila melanogaster, an allele (v) of the gene vermillion gives flies purple eyes and is recessive to the wildtype red eye color (v+). An allele y of the yellow gene, gives flies a yellow body color compared to the dominant brown body color (yt). A heterozygous females for the two different mutations is test-crossed with mutant (i.e., homozygous recessive) males. The phenotypes of the progeny of this cross and their corresponding numbers are given below Yellow body,...
Drosophila
T a heterozyg chromosome 2), and hot tamale Cht). 301 307 46 36 ap ht + 41 ap + b ht h 리)5 4. Black body (b/b), curved wing(c/e), and purple eye color (pr/pr) are recessive traits known to be on chromosome 2 in Drosophila. A testcross of a heterozygous female for all 3 genes was crossed to a black bodied, curved wing. purple eyed male fly and yielded the following progeny Phenotype class Number Type Phenotype class Number...
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...
Please show work.
2. You mate a female fly with a black body, purple eyes, and vestigial wing size to a wild- type male. These three alleles are located on chromosome II (autosome) in Drosophila. You testcross one of the Fi females to a male with all three mutations and record the results from the testcross in following table. Phenotype # of each phenotype Body color eye color wing size red red red red 900 le normal vestigial 90 50...
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...
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