For two non-syntenic loci why is the maximum frequency of recombination only 50%?(
For two non-syntenic loci why is the maximum frequency of recombination only 50%?(
Homework Answers
The recombination frequency cannot be greater than 50 percent because according to "law of independent assortment" of random genes , they produce 50 percent recombinant offspring and 50 percent parental offspring. For example,
If we cross one homozygous dominant tall with heterozygous dwarf plant , that is recessive in trait , produce only tall plants in F1 generation. When this F1 generation is selfed , they produce genotype.
1TT, 2 (Tt) and 1(tt) genotype
Here, TT and tt are parental genotype .
But 50 percent are recombinant (Tt), means not similar to their parents.
Therefore, recombinants could only be 50 percent.
Therefore, frequency of recombinant is only 50 percent.
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For two non-syntenic loci why is the maximum frequency of
recombination only 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...
SO/ do no 2. A series of 2-point crosses were carried out among 7 loci (a, b, c, d, e, f, and g. producing the following recombination frequencies. Map the 7 loci, showing their linkage groups, t...
SO/ do no 2. A series of 2-point crosses were carried out among 7 loci (a, b, c, d, e, f, and g. producing the following recombination frequencies. Map the 7 loci, showing their linkage groups, the order of the loci in each linkage group, and distances berween the loci of each group. () | % Reco Loci % Recombination 50 26 50 50 50 50 a- b a-c a-d a- e 50 50 12 50 50 4 10 50...
Required information The recombination frequency between genes that are located on different chromosomes is 50%, a...
Required information The recombination frequency between genes that are located on different chromosomes is 50%, a hallmark of independent assortment. Genes that are located close together on the same chromosome have a recombination frequency less than 50%, which is an indication of linkage. Complete the following questions to investigate recombination frequency between genes that are far apart on the same chromosome. Two genes on the same chromosome may have no crossover (NCO), a single crossover (SCO), or a double crossover...
Problem I A series of two-point crosses were carried out among seven loci (a, b, c,...
Problem I A series of two-point crosses were carried out among seven loci (a, b, c, d, e, f, and g), producing the following recombination frequencies. Map the seven loci, showing their linkage groups, the order of the loci in each linkage group, and distances between the loci of each linkage group. Loci % Recombination Loci % Recombination a - b 50 c - d 50 a - c 50 c - e 26 a - d 12 c -...
5. Quantitative trait loci(QTL) are: The loci that contribute all of the variation in a continuous...
5. Quantitative trait loci(QTL) are: The loci that contribute all of the variation in a continuous trait The loci that contribute all of the genetic variation in a continuous trait The loci that contribute the broad-sense heritability in a continuous trait The loci that contribute the narrow-sense heritability in a continuous trait 6. We looked at a study where Drosophila flies were selected for phototaxis (either attracted to or repelled by light). This experiment measures how much genetic variation existed...
27. An individual has the following genotype. Gene loci (A) and (B) are 15 map units...
27. An individual has the following genotype. Gene loci (A) and (B) are 15 map units apart, which determines their probability of recombination. 1) Indicate all the possible gametes that this individual can produce (with crossing over), 2) Label the gametes that are recombinant and non- recombinant. 3) Calculate the recombination frequency of the recombinant and non-recombinant gametes. The genes are not COMPLETELY linked. 28. Now imagine the genes are completed linked in #27. 1) What are all possible gametes?
Short Answer 27. An individual has the following genotype. Gene loci (A) and (B) are 20...
Short Answer 27. An individual has the following genotype. Gene loci (A) and (B) are 20 map units apart, which determines their probability of recombination. 1) Indicate all the possible gametes that this individual can produce (with crossing over), 2) Label the gametes that are recombinant and non- recombinant. 3) Calculate the recombination frequency of the recombinant and non-recombinant gametes. The genes are not COMPLETELY linked. bb BB 28. Now imagine the genes are completed linked in #27. 1) What...
Genetics b. (16 pts) A recombination event occurs between two DNA strands flanked by markers "A"...
Genetics
b. (16 pts) A recombination event occurs between two DNA strands flanked by markers "A" and "B" on one strand and different alleles of the same loci on the other s and "b"). Between these loci is the lac operon. The top strand has single missence mutations in both the lacž and lacY genes. During the recombination procs following Holliday intermediate structure is gencrat the lac I lacz lacY lac I lacZ lacY*
Linkage Disequilibrium a) Mention two processes that may cause LD. b) Why may the extent of...
Linkage Disequilibrium a) Mention two processes that may cause LD. b) Why may the extent of LD vary over a chromosome? c) After how many generations have the LD between two loci with a recombination rate of 0.1 declined to 50% of the starting LD? d) Calculate LD between two biallelic loci (alleles A/a and B/b) in a population that has just been formed by mixing equal number of individuals from two source populations with the following allele frequencies: Population...
You see a recombination frequency of 50% between two genes. Which of the following possibilities can...
You see a recombination frequency of 50% between two genes. Which of the following possibilities can you exclude? That the genes are located close together on the same chromosome That the genes are on different chromosomes O That the genes are assorting independently That the genes are located on the same chromosome, but very far apart Meiosis contributes to genetic diversity by: o Reducing the number of chromosomes for karyogamy (fusion of nuclei) with another gamete O Recombining homologous chromosomes...
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...
SO/ do no 2. A series of 2-point crosses were carried out among 7 loci (a, b, c, d, e, f, and g. producing the following recombination frequencies. Map the 7 loci, showing their linkage groups, the order of the loci in each linkage group, and distances berween the loci of each group. () | % Reco Loci % Recombination 50 26 50 50 50 50 a- b a-c a-d a- e 50 50 12 50 50 4 10 50...
Required information The recombination frequency between genes that are located on different chromosomes is 50%, a hallmark of independent assortment. Genes that are located close together on the same chromosome have a recombination frequency less than 50%, which is an indication of linkage. Complete the following questions to investigate recombination frequency between genes that are far apart on the same chromosome. Two genes on the same chromosome may have no crossover (NCO), a single crossover (SCO), or a double crossover...
27. An individual has the following genotype. Gene loci (A) and (B) are 15 map units apart, which determines their probability of recombination. 1) Indicate all the possible gametes that this individual can produce (with crossing over), 2) Label the gametes that are recombinant and non- recombinant. 3) Calculate the recombination frequency of the recombinant and non-recombinant gametes. The genes are not COMPLETELY linked. 28. Now imagine the genes are completed linked in #27. 1) What are all possible gametes?
Short Answer 27. An individual has the following genotype. Gene loci (A) and (B) are 20 map units apart, which determines their probability of recombination. 1) Indicate all the possible gametes that this individual can produce (with crossing over), 2) Label the gametes that are recombinant and non- recombinant. 3) Calculate the recombination frequency of the recombinant and non-recombinant gametes. The genes are not COMPLETELY linked. bb BB 28. Now imagine the genes are completed linked in #27. 1) What...
Genetics
b. (16 pts) A recombination event occurs between two DNA strands flanked by markers "A" and "B" on one strand and different alleles of the same loci on the other s and "b"). Between these loci is the lac operon. The top strand has single missence mutations in both the lacž and lacY genes. During the recombination procs following Holliday intermediate structure is gencrat the lac I lacz lacY lac I lacZ lacY*
You see a recombination frequency of 50% between two genes. Which of the following possibilities can you exclude? That the genes are located close together on the same chromosome That the genes are on different chromosomes O That the genes are assorting independently That the genes are located on the same chromosome, but very far apart Meiosis contributes to genetic diversity by: o Reducing the number of chromosomes for karyogamy (fusion of nuclei) with another gamete O Recombining homologous chromosomes...
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