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43. Genes a and b are X-linked and are located 7 mu apart on the X...
4. In Drosophila, the genes y, f, and v are all X-linked. y fv females are crossed to wild-type m...
please help with parts a-g
4. In Drosophila, the genes y, f, and v are all X-linked. y fv females are crossed to wild-type males and the F, females are test-crossed. The F2 males are distributed as follows: Phenotype Number 3210 72 1024 678 690 1044 60 3222 10,000 Give the genotype of the F1 females that gave rise to these progeny to show linkage phase? (2 points) A. 8. Which phenotypic classes are the parental types? (2 points) C....
2. In a testcross of a female Drosophila heterozygous for three linked recessive genes, the following...
2. In a testcross of a female Drosophila heterozygous for three linked recessive genes, the following phenotypes of progeny were obtained: 442 435 at bt d a bd at bd a bt d at bd a bt di at bt dt a bd Total ONEN 1000 A) Write out the parental genotype of the heterozygous parent indicating the correct allele configuration and gene order B) Construct a map of the genes and indicate the map-distances based on the data shown...
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...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart,...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart, If a plant with the genotype sh bz/ sh bz is selfed, what percentage of the progeny will be double recessive? 37. If the recombination frequency between the linked autosomal genes A and B in Drosophila is 15 percent, what phenotypic frequencies would you expect from a cross AB/ab females x AB/ab males? (There is no crossing over in Drosophila males). 38. In the...
Mapping genes with recombination frequencies in Drosopna 1. Suppose you know of three linked loci on...
Mapping genes with recombination frequencies in Drosopna 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...
Question 3. The vermillion mutation in flies is X-linked, while the brown mutation is autosomal. Which...
Question 3. The vermillion mutation in flies is X-linked, while the brown mutation is autosomal. Which of the following phenotypes will be observed in the Fl progeny from a cross between a vermillion-eyed female and a brown-eyed male? Option F1 daughters F1 sons Wild type Brown Wild type Vermillion c) Wild type Wild type (d) Brown Vermillion Vermillion Brown Question 6. DEFICIENCY MAPPING VIA COMPLEMENTATION In two mutagenesis experiments, one in which saturation mutagenesis was used with EMS and the...
In Drosophila, genes a and b are located at positions 22.0 and 42.0 on chromosome 2, and genes c ...
Explain how the positioning is used to calculate proportion.
In Drosophila, genes a and b are located at positions 22.0 and 42.0 on chromosome 2, and genes c and d are located at positions 10.0 and 25.0 on chromosome 3 A fly homozygous for the wild-type alleles of these four genes was crossed with a fly homozygous for the reces- sive alleles, and the F, daughters were backcrossed to their quadruply recessive fathers. What offspring would you expect from this...
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...
You are studying two linked, autosomal genes (A and B) in Drosophila. You make the following...
You are studying two linked, autosomal genes (A and B) in Drosophila. You make the following testcross between AB/ab (x) ab/abflies, and record the progeny results (see below). However, you have previously determined that the Aa/bb genotype is lethal in early embryogenesis (before hatching), and therefore these individuals never appear among the viable testcross progeny observed. Indicate the most accurate map distance between the A and B genes that can be determined from these data? Show all your work (scratch...
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...
please help with parts a-g
4. In Drosophila, the genes y, f, and v are all X-linked. y fv females are crossed to wild-type males and the F, females are test-crossed. The F2 males are distributed as follows: Phenotype Number 3210 72 1024 678 690 1044 60 3222 10,000 Give the genotype of the F1 females that gave rise to these progeny to show linkage phase? (2 points) A. 8. Which phenotypic classes are the parental types? (2 points) C....
2. In a testcross of a female Drosophila heterozygous for three linked recessive genes, the following phenotypes of progeny were obtained: 442 435 at bt d a bd at bd a bt d at bd a bt di at bt dt a bd Total ONEN 1000 A) Write out the parental genotype of the heterozygous parent indicating the correct allele configuration and gene order B) Construct a map of the genes and indicate the map-distances based on the data shown...
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...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart, If a plant with the genotype sh bz/ sh bz is selfed, what percentage of the progeny will be double recessive? 37. If the recombination frequency between the linked autosomal genes A and B in Drosophila is 15 percent, what phenotypic frequencies would you expect from a cross AB/ab females x AB/ab males? (There is no crossing over in Drosophila males). 38. In the...
Mapping genes with recombination frequencies in Drosopna 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...
Question 3. The vermillion mutation in flies is X-linked, while the brown mutation is autosomal. Which of the following phenotypes will be observed in the Fl progeny from a cross between a vermillion-eyed female and a brown-eyed male? Option F1 daughters F1 sons Wild type Brown Wild type Vermillion c) Wild type Wild type (d) Brown Vermillion Vermillion Brown Question 6. DEFICIENCY MAPPING VIA COMPLEMENTATION In two mutagenesis experiments, one in which saturation mutagenesis was used with EMS and the...
Explain how the positioning is used to calculate proportion.
In Drosophila, genes a and b are located at positions 22.0 and 42.0 on chromosome 2, and genes c and d are located at positions 10.0 and 25.0 on chromosome 3 A fly homozygous for the wild-type alleles of these four genes was crossed with a fly homozygous for the reces- sive alleles, and the F, daughters were backcrossed to their quadruply recessive fathers. What offspring would you expect from this...
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...
You are studying two linked, autosomal genes (A and B) in Drosophila. You make the following testcross between AB/ab (x) ab/abflies, and record the progeny results (see below). However, you have previously determined that the Aa/bb genotype is lethal in early embryogenesis (before hatching), and therefore these individuals never appear among the viable testcross progeny observed. Indicate the most accurate map distance between the A and B genes that can be determined from these data? Show all your work (scratch...
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...
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