Following statements are regarding to the protein phosphatase Cdc14 function in budding yeast.

A. In budding yeast, the protein phosphatase Cdc14 throws the switch between two mutually antagonistic states during anaphase.

B. Cdc14 is kept inactive during most of the cell cycle, but is activated during anaphase by a GTPase signaling pathway known as the mitotic exit network.

C. Mitotic exit network is unresponsive to spindle position and becomes active in anaphase.

D. Cdc14 phosphatase activated by the activation of protein kinase cascade.

E. Cdc14 dephosphorylates APC/CCdh1 and Sic1 to promote mitotic cyclin degradation

and mitotic CDK inactivation, respectively. This process leads to exit from mitosis.

Which of the following combination is incorrect?

#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

#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

#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

#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?

#Question id: 3372

#Unit 9. Evolution & Diversity of Life Forms

Fish, penguin and Dolphin are independently evolved similar traits as a result of having to adapt to similar environments or ecological niches.

A. On a molecular level, this can happen due to random mutation in unrelated taxon to adaptive changes

B. This is the example of divergent evolution, occurred due to similar group of organisms inhabiting different environments

C. Similar phenotype are produced by identical change in orthologous gene

D. This is the example of convergent evolution, occurred due to similar group of organisms inhabiting different environments

Which of the following is the correct combination?

#Question id: 3373

#Unit 9. Evolution & Diversity of Life Forms

Which of the following is correct statement?

A. Reproduction alone does not alter allelic or genotypic frequencies from generation to generation

B. Frequency of the heterozygote is always greatest when allelic frequencies are range between .33 and .66

C. Inbreeding is more likely to take place in nature when population size becomes very small and the number of mates is limited.

D. The movement of a few individuals between populations can counteract the effects of genetic drift