BIO 1130 Lecture Notes - Lecture 3: Gene Duplication, Valine, Fusion Gene

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12 Jan 2016

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Key mechanism to evolution, which is the change in genetic. Combination of population genetics and natural selection based on. A group of organisms of one species that interbreed and live in the same place at the same time. The study of genetic influences on the components of cause and effect in the somatic characteristics of populations. Evolution involving small-scale changes (i. e. within species) occurring over a short-period of time that results in the formation of new subspecies. Evolutionary changes will occur if there are changes in the allele frequencies in a population, or in chromosome structure due to mutation and recombination. Version of a gene (one member of a pair) that is located at a specific. Combination of new genes are produced when homologous position on a specific chromosome chromosomes exchange segments (recombination) This can result in different phenotypes in progeny. Allele frequencies particular gene arises in a population.

Related Questions

Which of the following statements is true about the theory of evolution?

The focus of the theory of evolution is to explain the origins of life.

According to the theory of evolution, life evolved entirely randomly.

The focus of the theory of evolution is to explain how life diversified from the first living cells.

According the theory of evolution, only the strongest and toughest can survive.

Which of the following best explains our current understanding of microevolution?

Neither microevolution nor macroevolution can be observed within a human lifespan?

Microevolution is the gradual change of the genetic makeup (allele frequency) of a population over time.

Microevolution and macroevolution occur by very different mechanisms

Microevolution is the evolution of small organisms; macroevolution is the evolution of large organisms.

The Irish elk is a giant species of deer that went extinct about 5,000 B.C. They are well-known for their extremely large antlers (12 feet wide) in males. The antlers likely played some role in protection against predators, but another possible cause for their large size could be

blending genetics

sexual selection

spontaneous generation

inheritance of acquired characteristics

Cross River gorilla is listed as critically endangered species. With only 35 of these gorillas in the world, they are at risk of extinction largely due to poaching and loss to diseases such as Ebola. Genetic studies of the remaining gorillas show very little variability, because several alleles were likely lost due to ______.

		genetic drift
		gene flow
		increased rate of spontaneous mutations
		adaptive radiation

Which statement about evolution by natural selection isfalse?

Natural selection allows organisms with higher fitness toreproduce more successfully.

Natural selection favors those traits that confer higherfitness in the environment.

Natural selection is a random change in characteristics of apopulation over generations.

Evolution by natural selection affects populations oforganisms, not individual organisms.

An organism's fitness depends on its _____.

ability to survive and reproduce

ability to swap genetic material with other organisms

physical size

ability to mutate

population

Consider the heavily armored stickleback fish population thatcolonized the lake. If all the individuals in that population weregenetically identical, what do you predict would happen when theycolonized the freshwater lake?

The population would increase, as it has increased foodresources.

The population would evolve through natural selection to bebetter adapted to its environment.

The population would decrease due to more juvenile fish beingeaten.

No answer text provided.

Which of the following are adaptations?

Thicker beaks on finches that allows them to eat large seeds,when large seeds are the most abundant.

Less armor on stickleback fish in freshwater that allows themto grow faster to avoid predation.

More armor on stickleback fish in the ocean that prevents themfrom being eaten by larger predators.

None of the above.

All of the above.

olivemink746

1. What prevailing views were directly challenged by the Principle of Uniformitarianism, first outlined by Charles Lyell in the Principles of Geology, which was published in 1830?

a. Earth is only a few thousand years old.

b. Species are fixed and unchanging.

c. Catastrophic events governed early Earth history and geologic processes operating in the past were fundamentally different from modern times.

d. A and C only

e. A, B and C

Which of the following statements are consistent with both Lamarckian evolution and modern views of Darwinian evolution?

a. Use and disuse of body parts allows organisms to adapt to their environment

b. Characteristics acquired during the lifetime of an organism are transmitted to offspring.

c. Evolution is progressive and goal-oriented.

d. New species are the result of descent with modification.

e. Natural selection is a mechanism of evolutionary change.

In the formula for determining a populationâs genotype frequencies, the term 2pq is based on principles of Mendelian genetics, which demonstrate that

a. heterozygotes can be produced in two ways.

b. the population is doubling in number.

c. heterozygotes have two different alleles.

d. A and C only

e. A, B and C

viridianraccoon618

BIO 1130 Lecture Notes - Lecture 3: Gene Duplication, Valine, Fusion Gene

BIO 1130 Full Course Notes

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