TLS Online TPP Program

#Question id: 4949


What probably accounts for the switch to DNA-based genetic systems during the evolution of life on Earth?

#Unit 11. Evolution and Behavior
  1. DNA is chemically more stable and replicates with fewer errors (mutations) than RNA.

  2. Only DNA can replicate during cell division.

  3. RNA is too involved with translation of proteins and cannot provide multiple functions.

  4. DNA forms the rod-shaped chromosomes necessary for cell division.

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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: 3291

#Unit 11. Evolution and Behavior

Which of the following is the most predictable outcome of increased gene flow between two populations?

TLS Online TPP Program

#Question id: 3292

#Unit 11. Evolution and Behavior

Which of the following is correct observation?

TLS Online TPP Program

#Question id: 3293

#Unit 11. Evolution and Behavior

In a Hardy-Weinberg population of butterflies find that 32% are heterozygous at a particular locus. What should be the frequency of the homozygous individuals in this population?