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the fruit fly, Drosophila melanogaster, an allele (v) of the gene vermillion gives flies purple eyes...
6. (7 points) Dr. O. Sophila is a famous geneticist who studies recombination of genes in...
6. (7 points) Dr. O. Sophila is a famous geneticist who studies recombination of genes in fruit flies. She is studying the relationship between a gene vermillion (v) that gives flies purple eyes and is recessive to the wildtype red eye color (vt) and the gene yellow (y) that gives flies a yellow body color compared to the dominant brown body color (y) Dr. Sophila has generated females heterozygous for the two different mutations and performs a testcross with mutant...
In Drosophila, the X-linked recessive mutation vermillion (v) causes bright red eyes, in contrast to the...
In Drosophila, the X-linked recessive mutation vermillion (v) causes bright red eyes, in contrast to the brick-red eyes caused by the wild-type allele. A separate autosomal recessive mutation, brown (bw), causes flies to have brown eyes. Flies carrying both mutations have no eye pigmentation and are white-eyed. Determine the F1 and F2 phenotypic ratios for each sex from the following crosses: (a) brown females X vermillion males (b) white-eyed females X wild-type males
2. The allele b gives Drosophila flies a black body, and bt gives brown, the wild-type...
2. The allele b gives Drosophila flies a black body, and bt 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, 6 black waxy cinnabar, 69 waxy cinnabar, 67 black, 382...
The allele se gives Drosophila a sepia body and se+ gives brown, the wild-type phenotype. The...
The allele se gives Drosophila a sepia body and se+ gives brown,
the wild-type phenotype. The allele ro of a separate gene gives
rough eyes and ro+ gives smooth eyes, the wild-type phenotype. The
allele ss of a third gene gives flies without thorax spines and ss+
gives flies with thorax spines, the wild-type phenotype.
When females heterozygous for each of these genes were
testcrossed with sepia, rough, spineless males, the following
classes and numbers of progeny were obtained:
wild...
Question 5 (14 marks) The allele cn gives fruit flies cinnabar eyes, whereas the allele cn...
Question 5 (14 marks) The allele cn gives fruit flies cinnabar eyes, whereas the allele cn gives red, the wild-type phenotype. The allele wx of a separate allele gives waxy wings, and wx gives non-waxy wings (wild-type). The allele b of a third gene gives fruit flies a black body, whereas the allele b gives a brown (wild-type) body colour. A geneticist knows these three genes are on the same chromosome, but does not know what order the genes are...
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...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus. there is a dominant gene for red eyes and its recessive allele for purple eyes. A female that was heterozygous at both gene loci was mated with a male that is homozygous for both recessive alleles. Knowing this, complete the sentences with the correct terms. 94% crossing over independent assortment...
Questions 10 and 11 please (10.-11.) The allele b gives Drosophila flies a black body and...
Questions 10 and 11 please
(10.-11.) The allele b gives Drosophila flies a black body and bt gives brown, the wild-type phenotype. The allele wx of a separate gene gives waxy wings and wx+ gives non-waxy, the wild-type phenotype. The allele cn of a third gene gives cinnabar eyes and cnt gives red, the wild-type phenotype. A female heterozygous for these three genes is testcrossed, and 1000 progeny are classified as follows: 382 cinnabar 379 black, waxy 69 waxy, cinnabar...
For Questions 15-18 The allele b gives Drosophila a black body, and b+ gives brown (the...
For Questions 15-18 The allele b gives Drosophila a black body, and b+ gives brown (the wildtype). The allele wx of a second gene gives waxy wings and wx* gives nonwaxy wings (the wildtype). The allele en of a third gene gives cinnabar eyes and cngives red (the wildtype). A female heterozygous for these three genes is testcrossed and 1000 progeny are classified as followst b, wx, en 389 b, wx, en 379 bt, wx, cn b, wx, en 67...
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...
6. (7 points) Dr. O. Sophila is a famous geneticist who studies recombination of genes in fruit flies. She is studying the relationship between a gene vermillion (v) that gives flies purple eyes and is recessive to the wildtype red eye color (vt) and the gene yellow (y) that gives flies a yellow body color compared to the dominant brown body color (y) Dr. Sophila has generated females heterozygous for the two different mutations and performs a testcross with mutant...
2. The allele b gives Drosophila flies a black body, and bt 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, 6 black waxy cinnabar, 69 waxy cinnabar, 67 black, 382...
The allele se gives Drosophila a sepia body and se+ gives brown,
the wild-type phenotype. The allele ro of a separate gene gives
rough eyes and ro+ gives smooth eyes, the wild-type phenotype. The
allele ss of a third gene gives flies without thorax spines and ss+
gives flies with thorax spines, the wild-type phenotype.
When females heterozygous for each of these genes were
testcrossed with sepia, rough, spineless males, the following
classes and numbers of progeny were obtained:
wild...
Question 5 (14 marks) The allele cn gives fruit flies cinnabar eyes, whereas the allele cn gives red, the wild-type phenotype. The allele wx of a separate allele gives waxy wings, and wx gives non-waxy wings (wild-type). The allele b of a third gene gives fruit flies a black body, whereas the allele b gives a brown (wild-type) body colour. A geneticist knows these three genes are on the same chromosome, but does not know what order the genes are...
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...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus. there is a dominant gene for red eyes and its recessive allele for purple eyes. A female that was heterozygous at both gene loci was mated with a male that is homozygous for both recessive alleles. Knowing this, complete the sentences with the correct terms. 94% crossing over independent assortment...
Questions 10 and 11 please
(10.-11.) The allele b gives Drosophila flies a black body and bt gives brown, the wild-type phenotype. The allele wx of a separate gene gives waxy wings and wx+ gives non-waxy, the wild-type phenotype. The allele cn of a third gene gives cinnabar eyes and cnt gives red, the wild-type phenotype. A female heterozygous for these three genes is testcrossed, and 1000 progeny are classified as follows: 382 cinnabar 379 black, waxy 69 waxy, cinnabar...
For Questions 15-18 The allele b gives Drosophila a black body, and b+ gives brown (the wildtype). The allele wx of a second gene gives waxy wings and wx* gives nonwaxy wings (the wildtype). The allele en of a third gene gives cinnabar eyes and cngives red (the wildtype). A female heterozygous for these three genes is testcrossed and 1000 progeny are classified as followst b, wx, en 389 b, wx, en 379 bt, wx, cn b, wx, en 67...
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...
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