Homework Answers
7.2 a) All mutant and wild type are parental .
b) all 6 phenotypes except mutant and wild type are recombinants since they are formed due to single cross over and double cross over.
7.1.1 Eyeless and shaven bristles , Normal eye and bristles are parental.
7.1.2 Eyeless and normal bristles , Normal eye and shaven bristles are non-parental.
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Practice 7.1. Cross a female fly with the eyeless mutation (a) for eye shape but normal...
Practice 1. Cross a female fly with the eyeless mutation for eye shape but normal bristle...
Practice 1. Cross a female fly with the eyeless mutation for eye shape but normal bristle to a male fly with wild type eye shape with shaven bristles. Both of these genes are located on chromosome IV (autosome) in Drosophila. Testcross F1 females to a male with both the eyeless and shaven bristle traits. Record the results of testcross in the Table 7.1 Table 1 Phenotype Eyeless, normal bristle Wild eye, shaven bristle Wild eye, Normal bristle Eyeless, shaven bristle...
Table 7.2 Phenotype # of each phenotype All mutant (parental) / Wild type (parental) Mutant veins...
Table 7.2 Phenotype # of each phenotype All mutant (parental) / Wild type (parental) Mutant veins and body color / / / / / / Mutant bristles Mutant veins and bristles Mutant body color Mutant body color and bristles Mutant veins / / / Practice 7.2. 7.2.3. Sketch a genetic map indicating the relative loci for each of these three alleles, and indicate the approximate map distance between each locus. 7.2.4. Calculate crossover interference (1-1-C) 7.2.4. Is it a negative...
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...
in the fruit fly Drosophila, a rubimentary Wong called 4. (2 points) In the fruit fly...
in the fruit fly Drosophila, a rubimentary Wong called
4. (2 points) In the fruit fly Drosophila, a rudimentary wing called "vestigial" and dark body color called "ebony" are inherited at independently assorting genes and are recessive to their dominant wild-type counterparts, full wings and gray body color. Wild-type males and females heterozygous for both traits are crossed, and 1800 progeny are are expected to be found with each possible phenotype? produced. How many progeny flies Full wing dominant Grol...
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...
The genes for sepia eye color, short bristles, and dark body coloration are on the same...
The genes for sepia eye color, short bristles, and dark body coloration are on the same chromosome of Drosophila melanogaster. Each gene has two alleles: wild type, which is dominant, or mutant, which is recessive. se+ is dominant and causes red eyes; se is recessive and causes sepia eyes sb+ is dominant and causes long bristles; sb is recessive and causes short bristles b+ is dominant and causes gray body coloration; b is recessive and causes dark...
We crossed pure-bred female flies with yellow body and forked-shaped bristles with male flies extra bristles....
We crossed pure-bred female flies with yellow body and
forked-shaped bristles with male flies extra bristles. The
subsequent F1 flies showed all normal phenotypes except that all of
the F1 males are yellow-body. We crossed again the normal F1
females with males homozygous for yellow body, extra bristles, and
forked bristles as a testcross. The number of each category of F2
progeny is shown below. The mutant allele for yellow body is y; the
mutant allele for extra bristles is...
studying gene silencing using the fly eye as a model. Below is a diagram showing part...
studying gene silencing using the fly eye as a model. Below is a diagram showing part of fly chromosome 3, including heterochromatin (striped region) near the centromere, euchromatin (solid region) two boundary elements, and three genes (spiky, green, and tiny). Recall that fly gene names are based off of their mutant phenotypes, so spiky LOF mutations make mutant eye cells spiky (rather than wild-type round), green LOF mutations make mutant eye cells green (rather than wild-type red), and tiny LOF...
Mapping genes with recombination frequencies in Drosophila 1. Suppose you know of three linked loci on...
Mapping genes with recombination frequencies in Drosophila 1. Suppose you know of three linked loci on the Drosophila X chromosome (a, b, and c). Assume that you are starting out with true-breeding stocks that show all three recessive traits and true-breeding stocks that show all three dominant traits. A. If you wanted to do a 3-point test cross to map the three loci, how would you set up the cross? What genotypes do you use for males and females in...
. . Please provide an explanation foreach part, and I will give a like. Thank you!!!...
.
.
Please provide an explanation foreach part, and I will
give a like. Thank you!!!
1) Researchers cross parental fruit flies with mutations in an eye color gene (either normal Red or mutant Bone) and a body bristle gene (either normal Wild-type or mutant Broken-Bristle). All of the first generation of flies had unbroken bristles and Red eyes. They mated the F1 flies to a fly that was Bone and Broken-Bristle (a test-cross). They examined the phenotypes of the...
Practice 1. Cross a female fly with the eyeless mutation for eye shape but normal bristle to a male fly with wild type eye shape with shaven bristles. Both of these genes are located on chromosome IV (autosome) in Drosophila. Testcross F1 females to a male with both the eyeless and shaven bristle traits. Record the results of testcross in the Table 7.1 Table 1 Phenotype Eyeless, normal bristle Wild eye, shaven bristle Wild eye, Normal bristle Eyeless, shaven bristle...
Table 7.2 Phenotype # of each phenotype All mutant (parental) / Wild type (parental) Mutant veins and body color / / / / / / Mutant bristles Mutant veins and bristles Mutant body color Mutant body color and bristles Mutant veins / / / Practice 7.2. 7.2.3. Sketch a genetic map indicating the relative loci for each of these three alleles, and indicate the approximate map distance between each locus. 7.2.4. Calculate crossover interference (1-1-C) 7.2.4. Is it a negative...
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...
in the fruit fly Drosophila, a rubimentary Wong called
4. (2 points) In the fruit fly Drosophila, a rudimentary wing called "vestigial" and dark body color called "ebony" are inherited at independently assorting genes and are recessive to their dominant wild-type counterparts, full wings and gray body color. Wild-type males and females heterozygous for both traits are crossed, and 1800 progeny are are expected to be found with each possible phenotype? produced. How many progeny flies Full wing dominant Grol...
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...
We crossed pure-bred female flies with yellow body and
forked-shaped bristles with male flies extra bristles. The
subsequent F1 flies showed all normal phenotypes except that all of
the F1 males are yellow-body. We crossed again the normal F1
females with males homozygous for yellow body, extra bristles, and
forked bristles as a testcross. The number of each category of F2
progeny is shown below. The mutant allele for yellow body is y; the
mutant allele for extra bristles is...
studying gene silencing using the fly eye as a model. Below is a diagram showing part of fly chromosome 3, including heterochromatin (striped region) near the centromere, euchromatin (solid region) two boundary elements, and three genes (spiky, green, and tiny). Recall that fly gene names are based off of their mutant phenotypes, so spiky LOF mutations make mutant eye cells spiky (rather than wild-type round), green LOF mutations make mutant eye cells green (rather than wild-type red), and tiny LOF...
Mapping genes with recombination frequencies in Drosophila 1. Suppose you know of three linked loci on the Drosophila X chromosome (a, b, and c). Assume that you are starting out with true-breeding stocks that show all three recessive traits and true-breeding stocks that show all three dominant traits. A. If you wanted to do a 3-point test cross to map the three loci, how would you set up the cross? What genotypes do you use for males and females in...
.
.
Please provide an explanation foreach part, and I will
give a like. Thank you!!!
1) Researchers cross parental fruit flies with mutations in an eye color gene (either normal Red or mutant Bone) and a body bristle gene (either normal Wild-type or mutant Broken-Bristle). All of the first generation of flies had unbroken bristles and Red eyes. They mated the F1 flies to a fly that was Bone and Broken-Bristle (a test-cross). They examined the phenotypes of the...
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