3-1. In a series of two-point mapping crosses involving six Drosophila genes, the following recombinant (single-crossover) frequencies were observed. (Show your work.) Two point cross | Recombination Frequencies % --- | --- cut - bw | 29 cut - vg | 13 cut - rosy | 21 cut - bent | 6 cut-dachs | 50 bw - bent | 35 bw - rosy | 8 bw - vg | 16 vg - bent | 19 vg-rosy | 8 rosy - bent | 27 bw - dachs | 50 vg - dachs | 50 A. How many linkage groups are present? B. Given that bw is near the end of chromosome II in Drosophila, construct a map of these genes and place them on the map below. The bw gene is already on the map. Indicate the map distances between the genes. bw
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First, we need to organize the given data in a table format to better understand the relationships between the genes. | Cross | Recombination Frequency (%) | |------------|-----------------------------| | cut - bw | 29 | | cut - vg Show more…
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3-1. In a series of two-point mapping crosses involving six Drosophila genes, the following recombinant (single-crossover) frequencies were observed. (Show your work.) Two point cross Recombination Frequencies % cut - bw 29 cut - vg 13 cut - rosy 21 cut - bent 6 cut-dachs 50 bw - bent 35 bw - rosy 8 bw - vg 16 vg - bent 19 vg-rosy 8 rosy - bent 27 bw - dachs 50 vg - dachs 50 A. How many linkage groups are present? B. Given that bw is near the end of chromosome II in Drosophila, construct a map of these genes and place them on the map below. The bw gene is already on the map. Indicate the map distances between the genes. bw
Katlin K.
In a series of two-point map crosses involving five genes located on chromosome II in Drosophila, the following recombinant (single-crossover) frequencies were observed: pr-adp 29 pr-vg 13 pr-c 21 pr-b 6 adp-b 35 adp-c 8 adp-vg 16 vg-b 19 vg-c 8 c-b 27 (a) If the adp gene is present near the end of chromosome II (locus 83), construct a map of these genes. (b) In another set of experiments, a sixth gene (d) was tested against b and pr, and the results were d - b = 17% and d - pr = 23%. Predict the results of two-point maps between d and c, d and vg, and d and adp.
Shaiju T.
In a series of two-point mapping crosses involving five genes located on chromosome II in hop beetles, the following single crossover frequencies were observed: h-g 29% h-cv 13% h-t 21% h-y 6% g-y 35% g-t 8% g-cv 16% cv-y 19% cv-t 8% t-y 27% A. Given that g maps near the end of the chromosome, construct a map of these genes. -----gene ?-----------gene?-----------gene?-----------gene?-----------gene?-----end of chromosome B. In another set of experiments, a sixth gene, z, was tested against y and h. The following results were obtained: z-y yielded 17% recombinants and z-h yielded 23% recombinants. What is the map distance between z and t?
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