Homework Answers
Starting with the highest recombination rates, arrange the genes as below :
R --------------------- 35 % ----------------L2
W2-------18%-------L2
R-------17%-----------W2
So order of the gene is : R W2 L2
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Recombination rates between three loci in corn are shown here, R and W2 17% R and...
Recombination rates between three loci, L2, R, and W2, in corn are shown in the table....
Recombination rates between three loci, L2, R, and W2, in corn are shown in the table. Loci L2 and R R and W2 L2 and W2 Recombination rate 35% 17% 18% Use the recombination rates to arrange the three genes on the section of DNA. DNA strand Answer Bank R W2 L2
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?
P, D, and Q are three genes found on a single chromosome in greyhounds. The recombination...
P, D, and Q are three genes found on a single chromosome in greyhounds. The recombination frequencies between the three genes are shown below. In which order are these genes found on the greyhound chromosome?P-D = 50%;P-Q=20%;D-Q = 30% OP-Q-D OP-D-Q OD-P-Q
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...
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...
The genetic map between four loci is given: P—2cM—Q-1cM-R---6cM---S The probability of recombination between P and...
The genetic map between four loci is given: P—2cM—Q-1cM-R---6cM---S The probability of recombination between P and S is Select one: a. 0.009 b. 0.012 c. 0.00012 d. 0.09 e. 0.9
4. You are studying three genes in corn and performed a three-point cross. The three genes...
4. You are studying three genes in corn and performed a three-point cross. The three genes are green (V) vs Viniscent (V) seedlings, blue (Pr) vs red kernels (pr) and white (B ) or brown (bm) leaf midrib color. The table below list the offspring resulting from a testcross with a female F1 heterozygote. Type of gamete (NR, SCO, DCO Phenotype Progeny Gamete from F1 heterozygote Virescent seedling red 101 kernel Red kernel 175 Red kernel, brown midrib 259 Virescent...
(9 points) You are interested in studying recombination frequencies in wasps. You identify a queen that...
(9 points) You are interested in studying recombination frequencies in wasps. You identify a queen that is heterozygous at three different loci on chromosome 5: G, H, and R. As queen wasps can produce haploid male offspring without fertilizing their eggs, you decide to look only at the genotypes of her male offspring in your analysis. Below is a list of the genotypes of her male offspring, and the number of individuals that fall into each genotypic class. 92 168...
19. R. W. Allard and W. M. Clement determined recombi- ADATA nation rates for a series...
19. R. W. Allard and W. M. Clement determined recombi- ADATA nation rates for a series of genes in lima beans (R. W. Allard and W. M. Clement. 1959. Journal of Heredity 50:63–67). The following table lists paired recombina- tion frequencies for eight of the loci (D, WI, R, S, L, Ms, C, and G) that they mapped. On the basis of these data, draw a series of genetic maps for the different linkage groups of the genes, indicating the...
In mice, genes for albinism (a), chronic, inflammation (i), and reduced sense of smell (r) are...
In mice, genes for albinism (a), chronic, inflammation (i), and reduced sense of smell (r) are linked. You initially crossed a mouse that is homozygous dominant for all three traits with a mouse that is homozygous recessive for all three traits. You then crossed several of the resulting F_1 offspring to mice that are homozygous recessive for all three traits. You observe the following phenotypes in the offspring: Diagram a map between the genes and calculate the map distances. If...
Recombination rates between three loci, L2, R, and W2, in corn are shown in the table. Loci L2 and R R and W2 L2 and W2 Recombination rate 35% 17% 18% Use the recombination rates to arrange the three genes on the section of DNA. DNA strand Answer Bank R W2 L2
P, D, and Q are three genes found on a single chromosome in greyhounds. The recombination frequencies between the three genes are shown below. In which order are these genes found on the greyhound chromosome?P-D = 50%;P-Q=20%;D-Q = 30% OP-Q-D OP-D-Q OD-P-Q
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...
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...
4. You are studying three genes in corn and performed a three-point cross. The three genes are green (V) vs Viniscent (V) seedlings, blue (Pr) vs red kernels (pr) and white (B ) or brown (bm) leaf midrib color. The table below list the offspring resulting from a testcross with a female F1 heterozygote. Type of gamete (NR, SCO, DCO Phenotype Progeny Gamete from F1 heterozygote Virescent seedling red 101 kernel Red kernel 175 Red kernel, brown midrib 259 Virescent...
(9 points) You are interested in studying recombination frequencies in wasps. You identify a queen that is heterozygous at three different loci on chromosome 5: G, H, and R. As queen wasps can produce haploid male offspring without fertilizing their eggs, you decide to look only at the genotypes of her male offspring in your analysis. Below is a list of the genotypes of her male offspring, and the number of individuals that fall into each genotypic class. 92 168...
19. R. W. Allard and W. M. Clement determined recombi- ADATA nation rates for a series of genes in lima beans (R. W. Allard and W. M. Clement. 1959. Journal of Heredity 50:63–67). The following table lists paired recombina- tion frequencies for eight of the loci (D, WI, R, S, L, Ms, C, and G) that they mapped. On the basis of these data, draw a series of genetic maps for the different linkage groups of the genes, indicating the...
In mice, genes for albinism (a), chronic, inflammation (i), and reduced sense of smell (r) are linked. You initially crossed a mouse that is homozygous dominant for all three traits with a mouse that is homozygous recessive for all three traits. You then crossed several of the resulting F_1 offspring to mice that are homozygous recessive for all three traits. You observe the following phenotypes in the offspring: Diagram a map between the genes and calculate the map distances. If...
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