In a transductional cross between an A+B+C+ genotype donor and an A-B-C- recipient, 100 A+ recombinants were selected. Of those, 15% were also B+, while 75% were C+. Which gene is closer to gene A on the chromosome, gene B or gene C?
Gene C is closer to the gene A.
Because 100 A+ recombinant are selected of which 75% or 75 are A+C+B(+/-) whereas only 15% or 15 are A+C(+/-) B+ . The next gene of a any gene transfer first than the other. That's why it's numbers are greater than the other genes.
Gene order is= A---C---B or B----C-----A.
Thank you......................
In a transductional cross between an A+B+C+ genotype donor and an A-B-C- recipient, 100 A+ recombinants...
A cross is made between an Hfr strain that is StrS a+ b+ d+ in genotype and an F– strain that is StrR a– b– d– in genotype. Interrupted-mating studies show that b+ enters the recipient strain last, and that the Str locus is very far away from b+, so it never enters the recipient strain. The b+ recombinants are then tested for the presence of the a+ and d+ alleles. The following data were obtained: a+ b+ d+ 326...
A bacterium with genotype A+B-C-was transduced by a particle carrying the linked genes A-B+C+, and A+B+C+ recombinants were selected. The reciprocal cross was also performed. The number of A+B+C+ recombinants was the same in both the first cross and the reciprocal cross. What information does this give you about the order of the three genes?
Question: A bacterium with genotype A+B-C-was transduced by a particle carrying the linked genes A-B+C+, and A+B+C+ recombinants were selected. The reciprocal cross was also performed. The number of A+B+C+ recombinants was the same in both the first cross and the reciprocal cross. What information does this give you about the order of the three genes? (please explain in as much details)- these genes are assumed as any random genes
2. A cross is made between two . coli strains: Hfr arg+ bio+leu+ X F arg-bio-leu-. Interrupted mating studies show that arg+ enters the recipient last, and so arg+ recombinants are selected on a medium containing bio and leu only. These recombinants are tested for the presence of bio+ and leu+. The following numbers of individuals are found for each genotype: arg+ bio+ leu+ 320 argt bio- leu+ 0 arg+ bio+ leu-8 arg+ bio- leu 48 a. What is the...
Which of the following blood transfusions would not be safe to perform? a) Type AB donor to type AB recipient Ob) Type A donor to type A recipient O c) Type AB donor to type A recipient Od) Type O donor to type A recipient Question 2 (1 point) Consider a gene on the X chromosome, with a dominant allele that causes the growth of a sixth finger in a human. A phenotypically normal mother and a six-fingered father mate....
33. Which of the following requires direct contact between a donor bacterium and a recipient bacterium for transfer of DNA? a. Crossing over b. Mutation c. Transduction d. Conjugation e. Transformation 34. All of the following are true of base substitutions except: a A base substitution may cause no change in the protein encoded by the affected gene b. A base substitution can result in the production of a shortened protein c. Mutations rarely involve base substitutions. d. Base substitutions...
What process requires contact between the donor cell and the recipient cell? A. transformation B. transduction C. transcription D. conjugation
What process requires contact between the donor cell and the recipient cell? A. transformation B. transduction C. transcription D. conjugation
Bb Problems, Set 6 Name A cross between an Hfr bacterial strain with genotype val met tyr.is crossed with an F strain with genotype val met tyr. Val is known to enter last, and so val" recombinants are selected on medium that contains no val (only met and tyr). Recombinant colonies are then tested for met and tyr". The table summarizes the results. #Colonies 552 valt met tyrt Genotype valt met+tyrt valt met- tyr+ valt met- tyr. valt met+ tyr-...
3. Across is made between an Hfr strain of the genotype StrSx-y+z-and an F-strain of the genotype StrRx+y-z+. Interrupted-mating studies show that of the three markers y+ is transferred least frequently to the exconjugants, and that the Str locus never enters the recipient strain. Selection for the y+ recombinants was followed by replica plating for the x and z alleles. The following data were obtained: x+ y+ z+ 79 x+ y+ z- 13 x- y+ z+ 4 x- y+ z-...