F. Construct a linkage map for the three loci showing all map distances. (6 points) G. Calculate the coefficient of coincidence in this region. (4 points)
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4. In Drosophila, the genes y, f, and v are all X-linked. y fv females are crossed to wild-type m...
Please answer this carefully Xd In Drosophila, the genes y, f, and vare all X-linked. Females...
Please answer this carefully Xd
In Drosophila, the genes y, f, and vare all X-linked. Females who are homozygous for recessive alleles of all three genes (y fv/y fv) are crossed to wild-type males. The resulting trihybrid F1 females are testcrossed. Answer questions a, b and c. The F2 are distributed as follows: vfv3210 ly fyt 1024 678 690 1044 601 V + + 3222 10,000 (3)_ _and__ (4)_ a. The F2 progeny that have the parental genotypes are: _(1)__and__(2)...
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...
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).
Can someone please help me answer this question, and teach me how to do it step...
Can someone please help me answer this question, and teach me how to do it step by step? I am currently taking genetics and am extremely confused. In Drosophila, the genes y, f, and v are all X-linked. Females who are homozygous for recessive alleles of all three genes (y f v / y f v) are crossed to wild-type males (y+ f+ v+ /y+ f+ v+ ). The resulting trihybrid F1 females are test-crossed. The F2 are distributed as...
4. There are three genes on the X-chromosome in drosophila, yellow (y), white (w), and cut...
4. There are three genes on the X-chromosome in drosophila, yellow (y), white (w), and cut (ct). A yellow-bodied, white-eyed, and a homozygous normal winged female fly was crossed to a male with wild type body, wild type eyes, and cut wings. The Fi females were wild type for all three traits, while the Fi males had yellow bodies, white eyes, normal wings. The Fi females were crossed to yellow bodied, white eyed, cut wing males. The resulting F2 progeny...
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...
Drosophila females of wild-type appearance but heterozygous for three autosomal traits are mated to males that...
Drosophila females of wild-type appearance but heterozygous for three autosomal traits are mated to males that are homozygous recessive for the three traits. The three autosomal recessive traits are glassy eyes (g), coal-colored bodies (c), and striped thoraxes (t). The three dominant traits are red eyes (g+), gray bodies (c+) and solid thoraxes (t+) (remember, the wild-type allele has a + after it). You examine 1000 progeny of the above cross and they have the following phenotypic classes: 265 g+c+t+ 275 gct 120 g+ct...
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...
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...
please solve qs12-23 and include explanations thanks A wild-type trihybrid soybean plant Phenotype Number is crossed...
please solve qs12-23 and include explanations thanks
A wild-type trihybrid soybean plant Phenotype Number is crossed to a pure-breeding Pale 648 soybean plant with the recessive Pale, oval phenotypes pale leaf (), oval seed Pale, short 10 (r), and short height (t). The results Pale, oval, short 102 of the three-point test cross are Oval shown in the table. Traits not listed Oval, short 618 are wild-type. Short 84 Wild type 98 1. True False The phenotypes 1630 listed in...
Please answer this carefully Xd
In Drosophila, the genes y, f, and vare all X-linked. Females who are homozygous for recessive alleles of all three genes (y fv/y fv) are crossed to wild-type males. The resulting trihybrid F1 females are testcrossed. Answer questions a, b and c. The F2 are distributed as follows: vfv3210 ly fyt 1024 678 690 1044 601 V + + 3222 10,000 (3)_ _and__ (4)_ a. The F2 progeny that have the parental genotypes are: _(1)__and__(2)...
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...
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).
4. There are three genes on the X-chromosome in drosophila, yellow (y), white (w), and cut (ct). A yellow-bodied, white-eyed, and a homozygous normal winged female fly was crossed to a male with wild type body, wild type eyes, and cut wings. The Fi females were wild type for all three traits, while the Fi males had yellow bodies, white eyes, normal wings. The Fi females were crossed to yellow bodied, white eyed, cut wing males. The resulting F2 progeny...
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...
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...
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...
please solve qs12-23 and include explanations thanks
A wild-type trihybrid soybean plant Phenotype Number is crossed to a pure-breeding Pale 648 soybean plant with the recessive Pale, oval phenotypes pale leaf (), oval seed Pale, short 10 (r), and short height (t). The results Pale, oval, short 102 of the three-point test cross are Oval shown in the table. Traits not listed Oval, short 618 are wild-type. Short 84 Wild type 98 1. True False The phenotypes 1630 listed in...
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