Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 13848
TLS Online TPP Program

#Question id: 15814

You and your lab partner have isolated 20 new mutant yeast strains that are defective in synthesis of threonine, an amino acid. These Thr- mutants do not grow on minimal medium, but they do grow on minimal medium supplemented with threonine. Ten of your Thr- mutants (numbered 1 through 10) were isolated in a strain of mating type a (MAT a). The other 10 Thr mutants (numbered 11 through 20) were isolated in a strain of mating type α (MAT α). You and your lab partner cross each of the MAT a strains to each of the MAT α strains, and you include crosses to the appropriate wild-type strains. Your experimental observations are shown in the table below, where (-) indicates diploids that did not grow on minimal medium and (+) indicates diploids that did grow on minimal medium.

Which mutations are recessive?

#Unit 8. Inheritance Biology
  1. only 9 and 14
  2. All except 9 and 14
  3. all the given mutation in the table is recessive
  4. 3, 4, 15 and 16 are shown the recessive mutation
More Questions
TLS Online TPP Program

#Question id: 15453

#Unit 4. Cell Communication and Cell Signaling

Activated B cells divide and differentiate into antibody-producing plasma cells, this process occurred in 
TLS Online TPP Program

#Question id: 15454

#Unit 4. Cell Communication and Cell Signaling

B cells migrate to the lymphoid follicles, they are directed by chemokine interaction_________, which is secreted by follicular dendritic cells (FDCs)
TLS Online TPP Program

#Question id: 15455

#Unit 4. Cell Communication and Cell Signaling

Variable region of antibody containing sequence motif DGYW/WRCH, which are responsible for mutation, where R, W, H represented as____
TLS Online TPP Program

#Question id: 15456

#Unit 4. Cell Communication and Cell Signaling

IL-5 Class Switch IgM into
TLS Online TPP Program

#Question id: 15457

#Unit 4. Cell Communication and Cell Signaling

Activation-Induced Cytidine Deaminase (AID), which was subsequently shown to be necessary for
TLS Online TPP Program

#Question id: 15519

#Unit 4. Cell Communication and Cell Signaling

Double-negative selection perform in between cortex to medulla movements in four stages DN1-DN4 based on the presence or absence of other cell surface molecules, In presence of which genotype cell loses the fate of other lymphoid cell?