1) Is the mutation in the SFSU fly in the SAME or DIFFERENT gene as the...
1) Is the mutation in the SFSU fly in the SAME or DIFFERENT gene as the mutation in the Stanford fly? To determine this, which cross should we perform? A. Cross the SFSU fly in a testcross B. Cross the Stanford fly in a testcross C. Cross the SFSU fly with a wild type fly D. Cross the Stanford fly with a wild type fly E. Cross the SFSU fly with the Stanford fly
Homework Answers
Is the mutation in the SFSU fly in the SAME OR DIFFERENT gene as the mutation in the standford fly. which cross should we perform ?.
option D ; cross the stanford fly with a wild type fly .
If they are in the same gene they do not develop wings and files are mutanats ,there is no complementation beacuse no wildtype of gene in the offsprings ,it will occurs only in the recessive allele.
If the mutations are in the different genes ,complementation occurs files are wildtype and develop wings
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1) Is the mutation in the SFSU fly in the SAME or DIFFERENT gene
as the...
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...
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...
A new gene is being investigated in fruit flies. The recessive allele of this gene (b)...
A new gene is being investigated in fruit flies. The recessive allele of this gene (b) causes the wings to develop a blue color, while the dominant allele (b) permits wild-type colorless wings to develop. Preliminary studies indicate that this new gene is located on the X-chromosome. You decided to perform a two-point testcross to determine its position relative to the well-established garnet eyes gene (g). You cross a female heterozygous for both genes with a testcross male fly, and...
Answer Choices: A) Only one of the strains has a mutation in an eye color gene....
Answer Choices:
A) Only one of the strains has a mutation in an eye color
gene.
b) Strains C and D have mutations in different genes.
C) Strains C and D have mutations in the same gene.
D) More information is needed to infer the location of
mutations.
! Required information Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white eyes have been identified (A–G). In each strain, the white eye trait is due to...
Required information Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white...
Required information Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white eyes have been identified (A-G). In each strain, the white eye trait is due to an autosomal recessive allele. It is possible all seven strains have mutations in the same gene. Alternatively, they may have mutations in different genes. To determine how many genes are involved in eye color in these flies, pair-wise crosses are performed between each strain. The offspring phenotypes resulting from...
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...
In Drosophila, b+ is the allele for normal body color and at the same gene b...
In Drosophila, b+ is the allele for normal body color and at the same gene b is the allele for black body color. A second gene controls wing shape. The shape can be either normal (vg+) or vestigial (vg). A cross is made between a homozygous wild type fly and fly with black body and vestigial wings. The offspring were then mated to black body, vestigial winged flies. The following segregation ratio was observed: Phenotype # Observed Wild Type (normal,...
Suppose that a geneticist discovers a new mutation in Drosophila melanogaster that causes the flies to...
Suppose that a geneticist discovers a new mutation in Drosophila melanogaster that causes the flies to shake and quiver. She calls this mutation quiver, qu, and determines that it is due to an autosomal recessive gene. She wants to determine whether the gene encoding quiver is linked to the recessive gene for vestigial wings, vg. She crosses a fly homozygous for quiver and vestigial traits with a fly homozygous for the wild-type traits, and then uses the resulting F1 females...
Three different strains of E. coli carry a mutation in the lac operon and/or laci gene....
Three different strains of E. coli carry a mutation in the lac operon and/or laci gene. The production of B-galactosidase (+ present or - absent) is measured when lactose is present and absent from the medium. Assume the mutations involve only 1, 0, or Z. A merodiploid is constructed for each of the three strains. The plasmid carries a wild type lac operon and lacl gene. The production of functional B-galactosidase (+ present or - absent) is measured when lactose...
Due to a recessive mutation in gene A, amino acid ‘Glu’ in position 25 of polypeptide...
Due to a recessive mutation in gene A, amino acid ‘Glu’ in position 25 of polypeptide A (the wild polypeptide) is replaced by ‘Ala’. Individuals who are homozygous for the mutant allele (aa) don’t have any phenotypic alterations. Based on this observation, which of the following IS TRUE? A. The mutation has occurred in the promoter. B. The mutation has occurred in one of the introns of the encoding gene. C. The mutation was a base substitution in one of...
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...
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...
A new gene is being investigated in fruit flies. The recessive allele of this gene (b) causes the wings to develop a blue color, while the dominant allele (b) permits wild-type colorless wings to develop. Preliminary studies indicate that this new gene is located on the X-chromosome. You decided to perform a two-point testcross to determine its position relative to the well-established garnet eyes gene (g). You cross a female heterozygous for both genes with a testcross male fly, and...
Answer Choices:
A) Only one of the strains has a mutation in an eye color
gene.
b) Strains C and D have mutations in different genes.
C) Strains C and D have mutations in the same gene.
D) More information is needed to infer the location of
mutations.
! Required information Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white eyes have been identified (A–G). In each strain, the white eye trait is due to...
Required information Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white eyes have been identified (A-G). In each strain, the white eye trait is due to an autosomal recessive allele. It is possible all seven strains have mutations in the same gene. Alternatively, they may have mutations in different genes. To determine how many genes are involved in eye color in these flies, pair-wise crosses are performed between each strain. The offspring phenotypes resulting from...
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...
In Drosophila, b+ is the allele for normal body color and at the same gene b is the allele for black body color. A second gene controls wing shape. The shape can be either normal (vg+) or vestigial (vg). A cross is made between a homozygous wild type fly and fly with black body and vestigial wings. The offspring were then mated to black body, vestigial winged flies. The following segregation ratio was observed: Phenotype # Observed Wild Type (normal,...
Suppose that a geneticist discovers a new mutation in Drosophila melanogaster that causes the flies to shake and quiver. She calls this mutation quiver, qu, and determines that it is due to an autosomal recessive gene. She wants to determine whether the gene encoding quiver is linked to the recessive gene for vestigial wings, vg. She crosses a fly homozygous for quiver and vestigial traits with a fly homozygous for the wild-type traits, and then uses the resulting F1 females...
Three different strains of E. coli carry a mutation in the lac operon and/or laci gene. The production of B-galactosidase (+ present or - absent) is measured when lactose is present and absent from the medium. Assume the mutations involve only 1, 0, or Z. A merodiploid is constructed for each of the three strains. The plasmid carries a wild type lac operon and lacl gene. The production of functional B-galactosidase (+ present or - absent) is measured when lactose...
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