Hypothesis I: The same histidine synthesis gene is defective in both strains B and C.

Hypothesis II: Different histidine synthesis genes are defective in strains B and C.

Results:

Strain

Growth on SD + HIS

Growth on SD

B

-

-

C

+

-

B x C

+

+

In Question Set 4, two hypotheses were discussed regarding the HIS mutations in strains B and C. Do your SD plate and SD+HIS plate results support Hypothesis I or Hypothesis II from Question Set 4?

3. A. ) Keeping in mind your answer to question #2 above, what is the predicted genotype of the diploid arising from the BxC mating?

B. ) Can you explain your SD plate and SD+HIS plate results in regards to the URA and LEU genotype of the new diploid that you have made?

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Irving HeathcoteLv2

21 Feb 2019

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Related questions

strain B genotype - his / ura / LEU & strain C genotype - his / URA / leu

A diploid will be formed from the B x C cross. What is the predicted genotype of this diploid?

On which plates should the diploid grow (SD+His, SD+His+Leu, SD+His+Ura, SD+His+Leu+Ura)?

Which plates allow the diploid to grow, but not the two haploid parents? (The word âcomplementationâ must be in your answer.)

What do you think will be the genotype of the mating type locus in this diploid?

amethystjackal213

Multiply questions here

Q2. What is the consequence of chromosome inversion on meiosis? (work on a zygote with one normal chromosome and one chromosome with an inversion)

Q3. Search the web or read the textbook. Find a disease that is caused by translocation. What kind of translocation causes the disease?

Q4. Briefly explain how downâs syndrome or other trisomy is generated (3 sentences should be enough for you to explain this clearly)

Q5. I mutated a culture of wild type E. coli cells and wanted to isolate mutants that are unable to synthesize uracil (a nitrogen base in RNA). How can I achieve my goal? (try to finish your answer in 2-3 sentences)

Q6. For the ura- mutant isolated in Q5, I want to convert it to URA+ by transformation. Please tell me how I can achive this transformation with 3 SIMPLE sentences

Q7. What is the difference and relationship between an Hfr cell and an F+ cell?

Q8. I want to set up a mating between an Hfr strain and an F- (ade- his- bio-) strain and detect bio+ recombinant. Please design the experiment for me. (What genotype for Hfr do you need to choose? How will you select your recombinant? etc).

Q9. I want to use phage T2 to transducer the wild type ADE2 gene from the wild type E. coli strain to an ade2- E. coli mutant. How can I do this experimentally? (please briefly describe the approach, not experimental details such as incubation for 10 min, etc).

Q10. We talked about recombination in both eukaryotes and prokaryotes. Are there any differences in these two recombination ? (what are they if there are?)

Q11. Whose (or what) experiment proves that DNA is the genetic material?

Q12. What knowledge did Watson and Crick use in constructing the DNA model?

Q13. How does the double helix model support the three major functions of genetic materials?

Q14. What is the major chemical force that holds DNA and histone together? Hydrogen bonds

Q15. If I label E. coli cells in an N15 medium overnight and chase cells in an N14 medium for 2 generations, what fraction of cells still carry the N15 label?

Q16. If a 1000 kilobase fragment of DNA has five evenly spaced replication origins and DNA polymerase moves at 1 kilobase per second, how many seconds will a cell take to produce two daughter molecules?

Q17. DNA polymerases catalyze the polymerization of nucleotides. Use the formula for enzyme catalyzed reaction (see the example) to describe DNA polymerases. Example: Enzyme Substrate A + substrate B -------------------ï product c + product D Q8. During DNA replication, what is the direction of the growing strand?

Q18. For DNA synthesis in cells, why are there a leading strand and a lagging strand?

Q19. The following is the DNA sequence of a template strand. If the primase begins to synthesize primers from the middle âgâ, what will the primer sequence be? (assuming the primer can be 8 nucleotides long) 5â GACTCTAgGACTCCT 3â

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