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Evolution of Populations (7.2)
Evolution of Populations (7.2)

... cells’ DNA by choice, only by random mutation. If a mutation occurs in the DNA that located in the gametes (sperm and eggs), then those changes may affect the next generation of offspring and therefore a change in traits has occurred. In other words, the “population” is evolving from generation to g ...
What is Genetic Engineering?
What is Genetic Engineering?

... DNA is cut in the desired place using restriction enzymes. Each different type of restriction enzyme "seeks out" and cuts DNA at a spot marked by a different sequence of base pairs. One restriction enzyme may cut the DNA at every "AATC", for example, while another cuts all "ATG" sequences. The DNA i ...
Natural selection
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Population Genetics
Population Genetics

... Genetic drift = the alteration of the gene pool of a small population due to chance. Two factors may cause genetic drift: a) Bottleneck effect may lead to reduced genetic variability following some large disturbance that removes a large portion of the population. The surviving population often does ...
Darwin`s Theory of Evolution (1020L)
Darwin`s Theory of Evolution (1020L)

... change and the cloned plants don't have the genetic information necessary to cope with or survive that change, they may die before successfully reproducing. If the environment continues to change, cloned plants may eventually die out completely. Darwin's Theory of Evolution Charles Darwin's theory o ...
Evidence of Evolution by Natural Selection
Evidence of Evolution by Natural Selection

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Punnett Squares & Probability
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Microevolution - Phillips Scientific Methods

... how many total alleles would be present? 4) In a population of 1000 humans, 840 possess the ability to roll their tongues (dominant trait) and 160 cannot. Determine the frequency of the dominant and recessive alleles in the population. 5) What is happening if the population is in “genetic ...
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Nearly Neutral Theory in Genome Age

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AP Biology Chapter 5 Notes

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Epistasis is not dominance.
Epistasis is not dominance.

... Females generally have two alleles for these genes. Males generally have only one allele. If a male inherits a sex-linked recessive allele from his mother, the allele will be ...
Are all mutants bad? - University of Missouri
Are all mutants bad? - University of Missouri

... Are all mutants bad? ...
< 1 ... 1882 1883 1884 1885 1886 1887 1888 1889 1890 ... 1937 >

Microevolution

Microevolution is the change in allele frequencies that occur over time within a population. This change is due to four different processes: mutation, selection (natural and artificial), gene flow, and genetic drift. This change happens over a relatively short (in evolutionary terms) amount of time compared to the changes termed 'macroevolution' which is where greater differences in the population occur.Population genetics is the branch of biology that provides the mathematical structure for the study of the process of microevolution. Ecological genetics concerns itself with observing microevolution in the wild. Typically, observable instances of evolution are examples of microevolution; for example, bacterial strains that have antibiotic resistance.Microevolution over time leads to speciation or the appearance of novel structure, sometimes classified as macroevolution. Macro and microevolution describe fundamentally identical processes on different scales.
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