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2021-05-14

What is an assumption of the Dobzhansky Muller model of speciation?

What is an assumption of the Dobzhansky Muller model of speciation?

The Dobzhansky-Muller Model is a scientific explanation of why natural selection influences speciation in such a way that when hybridization occurs between species, the resulting offspring is genetically incompatible with other members of its species of origin.

What is the most common reason for the disappearance of a hybrid zone resulting in the completion of the speciation process?

What is the most common reason for the disappearance of a hybrid zone, resulting in the completion of the speciation process? spatial gradient in the frequency of genotypes and phenotypes.

Which of the following suggests that sympatric speciation is occurring in rhagoletis Pomonella the apple maggot fly )?

Which of the following suggests that sympatric speciation is occurring in Rhagoletis pomonella (the apple maggot fly)? The sympatric races of the apple maggot fly are diverging, and potentially on the path to become separate species a evidence by fruit preference documented in the maggots.

What is the concept of one species splitting into two or more new species?

Microevolution. The process by which one species splits into two or more species (every time this occurs, the diversity of life increases)

What is the difference between speciation and evolution?

Evolution is the grand scale level of changes, occurring over a long period of time. Speciation is a small scale change of a population compared to evolution. The main difference between evolution and speciation is the level of changes brought to organisms by each process

Is speciation Evidence for Evolution?

We often think of speciation as a slow process. All the available evidence supports the idea that different species evolved from common ancestors, and yet, new species don’t pop up around us on a daily basis. Eventually, the two parts of the population may evolve so many differences that they can no longer interbreed.

What do u mean by natural selection?

Natural selection, process that results in the adaptation of an organism to its environment by means of selectively reproducing changes in its genotype, or genetic constitution.

Is disease part of natural selection?

Diseases are thought to persist in human populations primarily because of a balance between mutation, genetic drift, and natural selection, with alleles that contribute to disease introduced by mutation, governed in part by random genetic drift, but eventually eliminated from the population by purifying selection 5, 7

What is the role of natural selection in emerging diseases?

By driving highly protective variants to high prevalence, natural selection produces variants that might be readily detected in genetic association studies to help elucidate the biological basis of disease resistance.

What is a cause of the absence of the A and B alleles in Native American populations?

gene migration. The absence of the A and B alleles in Native American populations is a result of: gene flow.

What is another name for the evolutionary force called gene flow?

Gene flow occurs when genes are carried from one population to another. Also called migration, an example of gene is when pollen gets blown to a region where it previously did not exist, transporting new genetic material to that population. Mutations are also random

How is the theory of Uniformitarianism relevant?

He was the most prominent scientist of the time who opposed Darwin’s work on evolution. The relevance of the theory of uniformitarianism is that it: supports the theory of catastrophism.