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TLS Online TPP Program

#Question id: 12834

How Aurora B and the spindle assembly checkpoint pathway collaborate during every cell cycle to accurately attach every single pair of sister chromatids to the mitotic spindle in the correct, bioriented manner?

#Unit 2. Cellular Organization
  1. Aurora B phosphorylate microtubule-binding component of the kinetochore, the Ndc80 complex, leads to the generation of attached kinetochores, which are recognized by the spindle assembly checkpoint pathway.
  2. Aurora B phosphorylate microtubule-binding component of the kinetochore, the Ndc80 complex, leads to the generation of unattached kinetochores, which are recognized by the spindle assembly checkpoint pathway.
  3. Aurora B dephosphorylate microtubule-binding component of the kinetochore, the Ndc80 complex, leads to the generation of unattached kinetochores, which are recognized by the spindle assembly checkpoint pathway.
  4. Aurora B ubiquitinylates microtubule-binding component of the kinetochore, the Ndc80 complex, leads to the degradation of unattached kinetochores, which are recognized by the spindle assembly checkpoint pathway.
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TLS Online TPP Program

#Question id: 3366

#Unit 9. Evolution & Diversity of Life Forms

Red-Green color blindness is an X-linked recessive disorder. In a population which is in the Hardy-  Weinberg equilibrium, the incidence of occurrence of this in males is 2:2000. What will be the expected incidence of affected homozygous females?
TLS Online TPP Program

#Question id: 3367

#Unit 9. Evolution & Diversity of Life Forms

The largest unit within which gene flow can readily occur is a
TLS Online TPP Program

#Question id: 3368

#Unit 9. Evolution & Diversity of Life Forms

The origin of a new plant species by hybridization, coupled with accidents during nuclear division, is an example of
TLS Online TPP Program

#Question id: 3369

#Unit 9. Evolution & Diversity of Life Forms

Genetic drift refers to random changes in allele frequencies over time leads to following consequence

a. Loss of genetic diversity per generation   

b. change in allelic frequency just by chance 

c. It caused adaptive evolution

d. It one allele may reach to 0 frequency
TLS Online TPP Program

#Question id: 3370

#Unit 9. Evolution & Diversity of Life Forms

One thousand independent populations of Drosophila are established with 25 individuals in each population, of which, one individual is of Aa genotype and the other nine are of AA genotype. If random genetic drift is the only mechanism acting on these populations, then, after a large number of generations, the expected number of populations fixed for the "a" allele is
TLS Online TPP Program

#Question id: 3371

#Unit 9. Evolution & Diversity of Life Forms

If a given gene in a randomly mating population has three alleles a, b and c in the ratio of 0.6, 0.3 and 0.1 respectively, what is the expected frequency of all heterozygote?