TLS Online TPP Program

#Question id: 2962


Which of the following experimental observations (some real, some contrived) would not be consistent with our current understanding of cytokinesis?

#Unit 2. Cellular Organization
  1. Anti-myosin antibodies injected in a dividing cell cause cytokinesis to stop.

  2. When the myosin II gene is mutated, cells undergo nuclear division, but not cytokinesis.

  3. Anti-actin antibodies injected into dividing cells have no effect on cytokinesis.

  4. Actin filaments seen in micrographs are aligned parallel to the cleavage furrow.

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TLS Online TPP Program

#Question id: 3283

#Unit 11. Evolution and Behavior

if the forward ( p in to q) and reverse ( q in to p) mutation rates for alleles at a locus are 1×10−1 and 1×10−2 per generation, respectively and the allelic frequencies are p = 0.20 and q = 0.80. if you assuming random matting population. Which of the following observation correct?

TLS Online TPP Program

#Question id: 3284

#Unit 11. Evolution and Behavior

The fitness of three genotype are A1A1 < A1A2 = A2A2) Which of the following observation correct?

TLS Online TPP Program

#Question id: 3285

#Unit 11. Evolution and Behavior

Natural selection continually operates on each species to keep up with improvements made by competing species; each species’ environment deteriorates as its competitors evolve new adaptations. This is known as

TLS Online TPP Program

#Question id: 3286

#Unit 11. Evolution and Behavior

 In a human population, the gene frequencies of the alleles for the ABO system are as follows:

A = 29%                         B = 7%                                    0=64%

Assuming complete random mating and Hardy-Weinberg equilibrium,

What are the blood type A frequencies in this population?

TLS Online TPP Program

#Question id: 3287

#Unit 11. Evolution and Behavior

Which statement is not an assumption of the Hardy–Weinberg law?

a. The allelic frequencies (p and q) are equal.

b. The population is randomly mating.

c. The population is large.

d. Locus is di-allelic

TLS Online TPP Program

#Question id: 3288

#Unit 11. Evolution and Behavior

Migration causes changes in the allelic frequency of a population by introducing alleles from other populations. The magnitude of change due to migration depends on