#Question id: 5285
#XL - S Microbiology
A transformation experiment is carried out using donor DNA that is A+B+C+ and a recipient that is A-B- C-. A+ transformants are selected and tested further. Of these, 64% are B+ and none are C+. Also, B+ are selected, and 8% are also C+. What is the gene order
#Question id: 5287
#XL - S Microbiology
Interrupted matting of different Hfr strain with F- E.coli cell resulting generation of following strain Order of gene is
#Question id: 5290
#XL - S Microbiology
The following table shows mapping data from three interrupted mating experiments using three different Hfr strains and an F- strain: The order of genes is
#Question id: 5295
#XL - S Microbiology
A cross is made between an Hfr that is met+ thi+ pur+ and an F-that is met- thi- pur-. Interrupted mating studies show that met+ enters the recipient last, so met+ recombinants are selected on a medium containing supplements that satisfy only the pur and thi requirements. These recombinants are tested for the presence of the thi+ and pur+ alleles. The following numbers of individuals are found for each genotype:
|
A) Gene Order |
I |
Thi Pur Met |
|
II |
Pur Met Thi |
|
|
III |
Pur Thi Met |
|
|
B) Distance between Pur and Thi |
IV |
15.4 map unit |
|
V |
1.8 map unit |
What is the following correct combination?
#Question id: 5298
#XL - S Microbiology
Four E. coli strains of genotype a+ b− are labeled 1, 2, 3, and 4. Four strains of genotype a− b+ are labeled 5, 6, 7, and 8. The two genotypes are mixed in all possible combinations and (after incubation) are plated to determine the frequency of a+ b+ recombinants. The following results are obtained, where M = many recombinants, L = low numbers of recombinants, and 0 = no recombinants. On the basis of these results, assign a sex type (either Hfr, F+, or F−) to each strain
#Question id: 5323
#XL - T Zoology
An X-linked recessive gene produces red-green color blindness in humans. A woman with normal color vision whose father was color-blind marries a color-blind man. What is the probability that their son will be color-blind?