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2. In a testcross of a female Drosophila heterozygous for three linked recessive genes, the following...
In Drosophila, a fully hetero sophila, a fully heterozygous female with the X-linked recessive genes a...
In Drosophila, a fully hetero sophila, a fully heterozygous female with the X-linked recessive genes a bande not necessarily in that order on the chromosome) was mated to ma c(not necessarily in that order on the chromosom in that order on the chromosome). The offspring occurred in the following phenotypic ratios: Phenotypes Numbers wildtype ac,b 426 428 cb b, a c, a Total 1000 a) What is the arrangement among the genes? Which gene is in the middle? b) What...
43. Genes a and b are X-linked and are located 7 mu apart on the X...
43. Genes a and b are X-linked and are located 7 mu apart on the X chromosome of Drosophila. A female of genotype a+ b/a b+ is mated with a wild-type (a+b+/Y). a. What is the probability that one of her sons will be either a+b+ or a b+ in phenotype? b. What is the probability that one of her daughters will be a+b+ in phenotype? 44. Three recessive autosomal mutations in Drosophila: a versus wild-type A. b versus B,...
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...
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...
Number 605 Suppose a geneticist uses a three-point testcross to map three linked Drosophila recessive mutations...
Number 605 Suppose a geneticist uses a three-point testcross to map three linked Drosophila recessive mutations called s, z, and n. Genesis associated with abnormally slow movement, z is associated with a zigzag movement pattern, and n is associated with narrow wings. 635 F, Testcross Progeny Phenotype narrow slow, zigzag zigzag slow, narrow slow Zigzag, narrow slow, zigzag, narrow wild type The geneticist first crosses homozygous narrow flies to homozygous slow, zigzag flies. Next, he testcrosses the F, progeny to...
A geneticist is using a three-point testcross to map three linked Drosophila recessive mutations called a,...
A geneticist is using a three-point testcross to map three linked Drosophila recessive mutations called a, b, and c, where a is associated with anomalous gait, bis associated with buckled wings, and is associated with curved bristles. She first crosses homozygous anomalous, buckled flies to homozygous curved flies. Next, she testcrosses the F1 progeny to anomalous, buckled, curved flies. She obtains 1000 progeny distributed as shown. Which gene is in the middle? Testcross progeny phenotype Number curved 277 anomalous, buckled...
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...
Data set B presents the results of a testcross using female flies heterozygous for three traits...
Data set B presents the results of a testcross using female
flies heterozygous for three traits and male flies, which are
homozygous recessive for the same three traits. For this part of
the report do the following:You have first to determine the gene
order. Construct a genetic map for these three genes, including the
map distances between them. Clearly indicate the logic you followed
and show all your calculations.
91 504 346 342 343 344 476 79 B5 0 +...
Please help (2) In Drosophila there are three genes lozenge (z), singed (s), and crossveinless (c),...
Please help
(2) In Drosophila there are three genes lozenge (z), singed (s), and crossveinless (c), with each mutant allele recessive to the wild type allele. A cross between females heterozygous for these three loci and wild-type males yielded the following progeny: Females1010 Males + 39 430 +Cz 32 s27 C+ 441 SCz 31 Using these data, construct a linkage map (4 points) of the 3 genes and calculate the coefficient of coincidence (2 points) and interference (2 points).
Data Set B presents the results of a testcross using female flies heterzygous for three traits...
Data Set B presents the results of a testcross using female
flies heterzygous for three traits and male flies, which are
homozygous recessive for the same three traits.
Part B Data set B presents the results of a testcross using female flies heterozygous for three traits and male flies, which are homozygous recessive for the same three traits. For this part of the report do the following: a) Attach your data set to your report. b) Clearly indicate parental, SCO...
In Drosophila, a fully hetero sophila, a fully heterozygous female with the X-linked recessive genes a bande not necessarily in that order on the chromosome) was mated to ma c(not necessarily in that order on the chromosom in that order on the chromosome). The offspring occurred in the following phenotypic ratios: Phenotypes Numbers wildtype ac,b 426 428 cb b, a c, a Total 1000 a) What is the arrangement among the genes? Which gene is in the middle? b) What...
43. Genes a and b are X-linked and are located 7 mu apart on the X chromosome of Drosophila. A female of genotype a+ b/a b+ is mated with a wild-type (a+b+/Y). a. What is the probability that one of her sons will be either a+b+ or a b+ in phenotype? b. What is the probability that one of her daughters will be a+b+ in phenotype? 44. Three recessive autosomal mutations in Drosophila: a versus wild-type A. b versus B,...
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...
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...
Number 605 Suppose a geneticist uses a three-point testcross to map three linked Drosophila recessive mutations called s, z, and n. Genesis associated with abnormally slow movement, z is associated with a zigzag movement pattern, and n is associated with narrow wings. 635 F, Testcross Progeny Phenotype narrow slow, zigzag zigzag slow, narrow slow Zigzag, narrow slow, zigzag, narrow wild type The geneticist first crosses homozygous narrow flies to homozygous slow, zigzag flies. Next, he testcrosses the F, progeny to...
A geneticist is using a three-point testcross to map three linked Drosophila recessive mutations called a, b, and c, where a is associated with anomalous gait, bis associated with buckled wings, and is associated with curved bristles. She first crosses homozygous anomalous, buckled flies to homozygous curved flies. Next, she testcrosses the F1 progeny to anomalous, buckled, curved flies. She obtains 1000 progeny distributed as shown. Which gene is in the middle? Testcross progeny phenotype Number curved 277 anomalous, buckled...
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...
Data set B presents the results of a testcross using female
flies heterozygous for three traits and male flies, which are
homozygous recessive for the same three traits. For this part of
the report do the following:You have first to determine the gene
order. Construct a genetic map for these three genes, including the
map distances between them. Clearly indicate the logic you followed
and show all your calculations.
91 504 346 342 343 344 476 79 B5 0 +...
Please help
(2) In Drosophila there are three genes lozenge (z), singed (s), and crossveinless (c), with each mutant allele recessive to the wild type allele. A cross between females heterozygous for these three loci and wild-type males yielded the following progeny: Females1010 Males + 39 430 +Cz 32 s27 C+ 441 SCz 31 Using these data, construct a linkage map (4 points) of the 3 genes and calculate the coefficient of coincidence (2 points) and interference (2 points).
Data Set B presents the results of a testcross using female
flies heterzygous for three traits and male flies, which are
homozygous recessive for the same three traits.
Part B Data set B presents the results of a testcross using female flies heterozygous for three traits and male flies, which are homozygous recessive for the same three traits. For this part of the report do the following: a) Attach your data set to your report. b) Clearly indicate parental, SCO...
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