1. A,B and C are linked genes. Recombination between A and B is 10%; between A...
1. A,B and C are linked genes. Recombination between A and B is 10%; between A and C IS 7%; AND BETWEEN B AND C IS 17%. What is the order of these genes on chromosome?
Homework Answers
% recombination between A and B is 10. Therefore, distance between A and B is 10 cM. Similarly since the % recombination between A and C is 7%, so the distance between the two is 7 cM and the distance between B and C is 17 cM.
So according to this, A seems to be the middle gene with B and C on either sides. Thus, the gene order will be either BAC or CAB.
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1. A,B and C are linked genes. Recombination between A and B is
10%; between A...
1. a) 3 incompletely linked genes are found in the order A-B-C. You would expect the...
1. a) 3 incompletely linked genes are found in the order A-B-C. You would expect the recombination frequency to be lowest between a. A and B b. A and C c. B and C d. Unable to compute b) 3 incompletely linked genes are found in the order A-B-C. You would expect the recombination frequency to be highest between a. A and B b. A and C c. B and C d. Unable to compute
In Drosophila, the genes for black (b) body and curved (c) wings are linked on the...
In Drosophila, the genes for black (b) body and curved (c) wings are linked on the same chromosome. The frequency of recombination between b---c is 0.276. How many recombinant offspring would be expected if 2000 progeny were produced from a testcross between a female heterozygous for both genes and a homozygous recessive male?
Genes ‘‘a’’ and ‘’b’’ are linked with a recombination frequency of 10%. “A” is completely dominan...
Genes ‘‘a’’ and ‘’b’’ are linked with a recombination frequency of 10%. “A” is completely dominant over ‘’a’’ and ‘’B’’ is completely dominant of ‘’b’’. Assuming you start with the following parental genotypes AAbb and aaBB in a dihybrid cross Indicate the percentage of F2 progeny following an F1 self-cross that have: only parental types, both parental and recombinant types and only recombinant types. a. 90%, 10% 0% b. 45%, 45%, 10% c. 85%, 10%, 5% d. 81%, 18%, 1%...
12. Linked genes have recombination frequencies between: O 0 and 25%. O 0 and 10%. O...
12. Linked genes have recombination frequencies between: O 0 and 25%. O 0 and 10%. O 0 and 75%. O 0 and 100%. O 0 and 50%.
1. 2. 13. Which statement explains why the recombination frequency between two genes is always less...
1.
2.
13.
Which statement explains why the recombination frequency between two genes is always less than 50%? Recombination cannot be more than 50% because chromosomes are only 50 map units in length. The genotype of the F, gametes will always be 50% parental gametes and 50% recombinant gametes. Genes with a recombination frequency near 50% are unlinked and have an equal likelihood of being inherited together or separately. F1 gametes always have 50% of their alleles from each parental...
The recombination distance between two genes is 30 map units. Are the two genes on the...
The recombination distance between two genes is 30 map units. Are the two genes on the same chromosome? How do you know?
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...
genes A,B,C are linked in order. frequency of single crissover between A-B =15% and between B-C...
genes A,B,C are linked in order. frequency of single crissover between A-B =15% and between B-C = 20%. coeficient of coincidence= .7 how would you calculate ans how many double crosses will actually show up when a triple heterozygote is test corssed?
6. The table below gives the recombination rates of genes located on the same chromosome. Genes...
6. The table below gives the recombination rates of genes located on the same chromosome. Genes Rate of recombination a,b 50% ac 15% ad 38% a,e 8% b,c 50% b,d 13% be 50% cd 50% ce 7% d, e 45% Draw the genetic map of this chromosome.
QUESTION 4 Two genes on the same chromosome exhibit a recombination rater of 0.5. What can...
QUESTION 4 Two genes on the same chromosome exhibit a recombination rater of 0.5. What can be said about the linkage of these two genes? They are physically linked They are genetically linked They are unlinked They are both physically and genetically linked.
12. Linked genes have recombination frequencies between: O 0 and 25%. O 0 and 10%. O 0 and 75%. O 0 and 100%. O 0 and 50%.
1.
2.
13.
Which statement explains why the recombination frequency between two genes is always less than 50%? Recombination cannot be more than 50% because chromosomes are only 50 map units in length. The genotype of the F, gametes will always be 50% parental gametes and 50% recombinant gametes. Genes with a recombination frequency near 50% are unlinked and have an equal likelihood of being inherited together or separately. F1 gametes always have 50% of their alleles from each parental...
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...
6. The table below gives the recombination rates of genes located on the same chromosome. Genes Rate of recombination a,b 50% ac 15% ad 38% a,e 8% b,c 50% b,d 13% be 50% cd 50% ce 7% d, e 45% Draw the genetic map of this chromosome.
QUESTION 4 Two genes on the same chromosome exhibit a recombination rater of 0.5. What can be said about the linkage of these two genes? They are physically linked They are genetically linked They are unlinked They are both physically and genetically linked.
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