Homework Answers
Since Interference is 50%, observed number of Double Recombinants is 50% of the Expected number of double recombinants. Therefore out of 1000 progeny, while 20 progeny were expeceted to be double crossovers, only 10 must be obseved.
That is, as opposed to a 2% double crossover frequency, a 1% double crossover frequency was observed.
Now with complete interference (no double crossovers), 70% of progeny is of parental type (35% a+ b+ c+ ; 35% a b c) and the remaining 30% has single crossovers.
Assuming 50% interference, 35.5% of progeny will be either parental type (a+ b+ c+ or a b c). Therefore,
E. 355 is correct
Add Answer to:
SdVU In Drosophila, three autosomal genes have the following map (Fig. E) 20 m,u. 10 m.u....
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....
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 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...
In Drosophila, the autosomal recessive traits for dumpy wings (dp) and cinnabar eyes (cn) are found...
In Drosophila, the autosomal recessive traits for dumpy wings (dp) and cinnabar eyes (cn) are found on chromosome 2, separated by 44 map units. The allele for shaven bristles (sv) is found on chromosome 4 and is also recessive. A female with shaven. bristles is crossed to a male expressing dumpy wings and cinnabar eyes. FI females are test-crossed to males expressing all three traits. 3. What proportion of F2 flies (of either sex) will be completely wild type? a....
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).
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...
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; b is associated with buckled wings; and c 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 the following results. From this data, calculate the map distance between a and...
FIVE. You have identified a new mutant in Drosophila that defines a gene you call “red.” When mutant it causes the “neck” of the fly (cervical connective) to be red. It behaves as an autosomal recessi...
FIVE. You have identified a new mutant in Drosophila that defines a gene you call “red.” When mutant it causes the “neck” of the fly (cervical connective) to be red. It behaves as an autosomal recessive mutation with alleles red+ and red-. You suspect it is linked to two known genes on the second chromosome “re” and “ti”. The re- mutation behaves as an autosomal recessive. Homozygous mutant flies fixate on TV reruns, “re+” normal flies avoid TV. The “ti”...
The following map indicates the order of three genes (A, B, and C) on a chromosome...
The following map indicates the order of three genes (A, B, and C) on a chromosome and the number of map units between adjacent gene pairs. What is the expected frequency of the gametes ABC and abc produced by an individual of genotype AbC//aBc. (Assume no interference.) A---->8 m.u.--->B --->24 m.u.--->C 0 69.92% O 0.96% 06.08% 1.92% 022.1%
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...
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....
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 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...
In Drosophila, the autosomal recessive traits for dumpy wings (dp) and cinnabar eyes (cn) are found on chromosome 2, separated by 44 map units. The allele for shaven bristles (sv) is found on chromosome 4 and is also recessive. A female with shaven. bristles is crossed to a male expressing dumpy wings and cinnabar eyes. FI females are test-crossed to males expressing all three traits. 3. What proportion of F2 flies (of either sex) will be completely wild type? a....
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...
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; b is associated with buckled wings; and c 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 the following results. From this data, calculate the map distance between a and...
The following map indicates the order of three genes (A, B, and C) on a chromosome and the number of map units between adjacent gene pairs. What is the expected frequency of the gametes ABC and abc produced by an individual of genotype AbC//aBc. (Assume no interference.) A---->8 m.u.--->B --->24 m.u.--->C 0 69.92% O 0.96% 06.08% 1.92% 022.1%
Most questions answered within 3 hours.
-
convert grams into vloume with the density of water being at
.997514 g/cm^3 at 23.1 Celsuis...
asked 1 hour ago -
Foreman company obtained a $20,000, 6% loan on May 1, 2018.
Principal and interest will be...
asked 1 hour ago -
5. Problem 11.05 (Discounted Payback)
eBook
Project L costs $60,000, its expected cash inflows are $14,000
per...
asked 1 hour ago -
1. Which of the following is true about politics and health
organizations?
A. Health organizations are...
asked 2 hours ago -
A space vehicle is coasting at a constant velocity of 18.1 m/s
in the +y direction...
asked 3 hours ago -
5) Use the following balanced equation to answer questions
(a)-(i).
3 Cu(s) + 8 HNO3(aq) →...
asked 2 hours ago -
A three-year maturity bond with a 12% annual coupon rate is
currently traded at par $1000...
asked 3 hours ago -
1.
What is the minimum volume to use in the Spec 20 cuvette in order
to...
asked 3 hours ago -
A builder wants to install wall-to-wall carpeting in a living
room of length 8.87 m and...
asked 3 hours ago -
Organizational change can produce anxiety in those affected by
the change. In what ways can change...
asked 3 hours ago -
Ozone in the atmosphere may react with nitric oxide.
From the following data, calculate the DG...
asked 3 hours ago -
Steven Long, a bond analyst, is analyzing a convertible bond.
The characteristics of the bond are...
asked 3 hours ago