Homework Answers
Answer 1:) option c
P-element induced can identify by parental and maternal cross or by using a large deletion that may take away the p-element. The mutation is homozygous. Therefore, if the deleted part takes away the p-element, there would be no complementation.
Answer 2:) No
To make the red-eye phenotype, the wild type allele must have a dominant homozygous genotype (red). This will rescue the mutant phenotype because it is homozygous and it will become useless in the heterozygous phase.
Answer 3:) Red (wild type)
The white-eyed Drosophila has both mutant alleles. Therefore, the scarlet gene will show its effect and due to this, the red color will show.
Answer 4:) Option a
If there is no observation of RNAi, then perform the Northern blot to identify RNAi bound interested RNA level. It will tell about the significance of the test.
Answer 5:) Option e
The experiment did not continue the heat shock at the adulthood stage. Therefore, we cannot say about the effect of the heat shock promoter in the gene at the adulthood stage. However, the gene is not essential because providing heat shock will activate the gene and due to its expression, drosophila dies. If the gene is silent, drosophila will survive.
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You have a P-element induced mutation that is homozygous lethal. You think that the element might...
Fruit flies normally have dull red eyes. Some fruit flies have white eyes due to mutation...
Fruit flies normally have dull red eyes. Some fruit flies have white eyes due to mutation in a gene on the X-chromosome. The white eyed phenotype is X-linked recessive. The sex chromosomes in fruit flies are: females, normally XX; males, normally XY. If a white-eyed female (mutant phenotype) mates with a red-eyed male (normal or wild- type phenotype), what is the likelihood that their female offspring will have red eyes? Parents: white-eyed female X red-eyed male Select one: a. O...
In Genetics lab, you decide to further investigate Drosophila eye color. In addition to studying the...
In Genetics lab, you decide to further investigate Drosophila eye color. In addition to studying the sepia gene (se), you decide to study the gene mahogany eyes (mo). Flies that are mo-/mo- have brown eyes. You wonder if a fly that is a double mutant for sepia and mahogany eyes would have very dark brown (almost black) eyes. Because se and mo are both on the third chromosome, you have to do a recombination. You look through a former labmate’s...
please help me!!! 5.) You have discovered mutants in two new gene mutants in Drosophila. One...
please help me!!!
5.) You have discovered mutants in two new gene mutants in Drosophila. One mutant, curl, has small, curly, nonfunctional wings. The other mutant, big, has enormous eyes. You decide to test if these two new genes are on chromosome #2, so you perform a three-gene linkage testcross using a gene that you know is on chromosome #2, trp, a mutant that cannot make its own tryptophan (and so must get it from its food). In all three...
5.) You have discovered mutants in two new gene mutants in Drosophila. One mutant, curl, has...
5.) You have discovered mutants in two new gene mutants in Drosophila. One mutant, curl, has small, curly, nonfunctional wings. The other mutant, big, has enormous eyes. You decide to test if these two new genes are on chromosome #2, so you perform a three-gene linkage testcross using a gene that you know is on chromosome #2, trp, a mutant that cannot make its own tryptophan (and so must get it from its food). In all three cases, these mutant...
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;...
can you please help me with number 4? An example of linked genes in Drosophila The...
can you please help me with number 4?
An example of linked genes in Drosophila The genes for wing shape and body color are linked (they are on the same chromosome) Drosophila and linked genes In the example shown left, wild type alleles are dominant and are given an upper case symbol of the mutant phenotype (Cu or Eb). This notation used for Drosophila departs from the convention of using the dominant gene to provide the symbol. This is necessary...
LABORATORY 6. MENDELIAN GENETICS: GENERAL REMARKS AND Drosophila 1. Are the genes for the body color,...
LABORATORY 6. MENDELIAN GENETICS: GENERAL REMARKS AND Drosophila 1. Are the genes for the body color, eye color, and wing shape recessive or dominant? Explain your answer. Yellow: _______________ White: _________________ Miniature: ____________ Sepia: _________________ Explanation: _________________________________________ _________________________________________ _________________________________________ _________________________________________ _________________________________________ 2. Where are these genes located? On an autosome(s) or sex chromosome? Explain your answer Yellow: _______________ White: _________________ Miniature: ____________ Sepia: _________________ Explanation: _________________________________________ _________________________________________ 2. Set up a X2 to test if the yellow (y) (body color)...
complete. Read carefully. Make a full complete presentation of your results. Place your answer, clearly organized,...
complete. Read carefully. Make a full complete presentation of your results. Place your answer, clearly organized, on the next page A. The fly characteristics brown eye and vestigial wing are both located on the fly chromosome II and they are approximately 20 mu apart. Please draw a complete presentation of a dihybrid test cross and the expected outcome from the cross. Show your cross, if you are using coupling or repulsion, the Punnett square associated and the predicted frequencies and...
2. A dominant allele H reduces the number of body bristles that Drosophila flies have, giving...
2. A dominant allele H reduces the number of body bristles that Drosophila flies have, giving rise to a “hairless” phenotype. In the homozygous condition, H is lethal. An independently assorting dominant allele S has no effect on bristle number except in the presence of H, in which case a single dose of S suppresses the hairless phenotype, thus restoring the "hairy" phenotype. However, S also is lethal in the homozygous (S/S) condition. What ratio of hairy to hairless flies...
Match the following terms with the appropriate description below: a. alleles b. autosomes c. dominant allele...
Match the following terms with the appropriate description
below:
a. alleles b. autosomes c. dominant allele d. genotype e.
heterozygous f. homozygote g. phenotype h. recessive allele i. sex
chromosomes
1. ________________ genetic make-up
2. ________________ how genetic make-up is expressed
3. ________________ chromosomes that dictate most body
characteristics
4. ________________ alternative forms of the same gene
5. ___________an individual bearing two alleles that are the same
for a particular trait 6. ________________ an allele that is
expressed, whether in...
Fruit flies normally have dull red eyes. Some fruit flies have white eyes due to mutation in a gene on the X-chromosome. The white eyed phenotype is X-linked recessive. The sex chromosomes in fruit flies are: females, normally XX; males, normally XY. If a white-eyed female (mutant phenotype) mates with a red-eyed male (normal or wild- type phenotype), what is the likelihood that their female offspring will have red eyes? Parents: white-eyed female X red-eyed male Select one: a. O...
please help me!!!
5.) You have discovered mutants in two new gene mutants in Drosophila. One mutant, curl, has small, curly, nonfunctional wings. The other mutant, big, has enormous eyes. You decide to test if these two new genes are on chromosome #2, so you perform a three-gene linkage testcross using a gene that you know is on chromosome #2, trp, a mutant that cannot make its own tryptophan (and so must get it from its food). In all three...
5.) You have discovered mutants in two new gene mutants in Drosophila. One mutant, curl, has small, curly, nonfunctional wings. The other mutant, big, has enormous eyes. You decide to test if these two new genes are on chromosome #2, so you perform a three-gene linkage testcross using a gene that you know is on chromosome #2, trp, a mutant that cannot make its own tryptophan (and so must get it from its food). In all three cases, these mutant...
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;...
can you please help me with number 4?
An example of linked genes in Drosophila The genes for wing shape and body color are linked (they are on the same chromosome) Drosophila and linked genes In the example shown left, wild type alleles are dominant and are given an upper case symbol of the mutant phenotype (Cu or Eb). This notation used for Drosophila departs from the convention of using the dominant gene to provide the symbol. This is necessary...
complete. Read carefully. Make a full complete presentation of your results. Place your answer, clearly organized, on the next page A. The fly characteristics brown eye and vestigial wing are both located on the fly chromosome II and they are approximately 20 mu apart. Please draw a complete presentation of a dihybrid test cross and the expected outcome from the cross. Show your cross, if you are using coupling or repulsion, the Punnett square associated and the predicted frequencies and...
Match the following terms with the appropriate description
below:
a. alleles b. autosomes c. dominant allele d. genotype e.
heterozygous f. homozygote g. phenotype h. recessive allele i. sex
chromosomes
1. ________________ genetic make-up
2. ________________ how genetic make-up is expressed
3. ________________ chromosomes that dictate most body
characteristics
4. ________________ alternative forms of the same gene
5. ___________an individual bearing two alleles that are the same
for a particular trait 6. ________________ an allele that is
expressed, whether in...
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