Design a series of crosses in which you can tell a fly with a lobe allele,...
Design a series of crosses in which you can tell a fly with a lobe allele, but a wild type phenotype, from a true wild type fly.
Hint: Lobe is a dominant autosomal allele that exhibits variable expressivity, in which the eye size and number of facets is reduced; the eye may also have a nick or nicks in the edge in this mutant. Lobe also demonstrates incomplete penetrance; in the true breeding strain, the eye may also be wild type in shape and size. So, the eye may be wild type in size, only slightly reduced in size, or may be much smaller than wild type. These flies have also red eyes, but the eyes vary in size.
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Design a series of crosses in which you can tell a fly with a
lobe allele,...
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...
Answer Choices: A) No B) More information is needed to determine eye color C) Yes !...
Answer Choices:
A) No
B) More information is needed to determine eye color
C) Yes
! 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...
Answer Choices: A) No B) More information is needed to determine eye color C) Yes Required...
Answer Choices:
A) No
B) More information is needed to determine eye color
C) Yes
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...
Answer Choices: A) A, B B) F, G C) C, D, F, G D) F Required...
Answer Choices:
A) A, B
B) F, G
C) C, D, F, G
D) F
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...
You are working with the fruit fly that generally exhibits a brick red eye color (wild-type)....
You are working with the fruit fly that generally exhibits a brick red eye color (wild-type). In one stock vial you recover an eye color mutant with brown eyes that you use to eventually derive a pure-breeding brown-eyed stock. Your friend, performing independent studies on the fruit fly, also recovers a pure breeding brown eye color mutant that is phenotypically identical to your strain. How would you go about determining if the two pure-breeding brown-eyed mutant strains represent mutations in...
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...
39. You have crossed two fruit fly individuals that have long wings and red eyes -...
39. You have crossed two fruit fly individuals that have long wings and red eyes - the wild-type phenotype. In the progeny, the mutant phenotypes called curved wings and lozenge eyes appear as follows: Females 600 long-wing, red eyes 200 curved wing, red eyes Males 300 long-wing red eyes 300 long-wing, lozenge eyes 100 curved wing, red eyes 100 curved wing, lozenge eyes According to these data, the lozenge eye allele is A. sex-linked dominant B. sex-linked recessive C. autosomal...
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...
1) Consider a single germ cell with the genotype A/a;B/b undergoing meiosis. Which of the following...
1) Consider a single germ cell with the genotype A/a;B/b undergoing meiosis. Which of the following are possible genotypes for the set of four gametes resulting from meiosis of this single germ cell? (assume that there is NOT any nondisjunction) A, a, B, b Aa, Aa, Bb, Bb AB, Ab, aB, ab Ab, Ab, aB, aB aa, AA, BB, bb 2) From true-breeding stocks, a female fly with no eyes (mutation in eyeless (ey) gene) and no wings (mutation in...
Can you please help me with this problem: 3. The allele b gives Drosophila flies a...
Can you please help me with this problem:
3. The allele b gives Drosophila flies a black body, and b+ gives brown, the wild type phenotype. The allele wx of a separate gene gives waxy wings, and wx+ gives nonwaxy, the wild type phenotype. The allele cn of a third gene gives cinnabar eyes, and cn+ gives red, the wild-type phenotype. A female heterozygous for these three genes is testcrossed, and 1000 progeny are classified as follows: 5 wild type;...
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...
Answer Choices:
A) No
B) More information is needed to determine eye color
C) Yes
! 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...
Answer Choices:
A) No
B) More information is needed to determine eye color
C) Yes
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...
Answer Choices:
A) A, B
B) F, G
C) C, D, F, G
D) F
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...
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...
39. You have crossed two fruit fly individuals that have long wings and red eyes - the wild-type phenotype. In the progeny, the mutant phenotypes called curved wings and lozenge eyes appear as follows: Females 600 long-wing, red eyes 200 curved wing, red eyes Males 300 long-wing red eyes 300 long-wing, lozenge eyes 100 curved wing, red eyes 100 curved wing, lozenge eyes According to these data, the lozenge eye allele is A. sex-linked dominant B. sex-linked recessive C. autosomal...
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...
Can you please help me with this problem:
3. The allele b gives Drosophila flies a black body, and b+ gives brown, the wild type phenotype. The allele wx of a separate gene gives waxy wings, and wx+ gives nonwaxy, the wild type phenotype. The allele cn of a third gene gives cinnabar eyes, and cn+ gives red, the wild-type phenotype. A female heterozygous for these three genes is testcrossed, and 1000 progeny are classified as follows: 5 wild type;...
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