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jeopardy - AMERICAN-HISTORY
jeopardy - AMERICAN-HISTORY

... to spend more time in the ocean, perhaps because food was easier to find. In each generation, those with bodies that moved efficiently in water survived longer and produced more offspring than others. Eventually, the whole population came to resemble today’s dolphins. ...
Mendelian Genetics
Mendelian Genetics

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Genetics Problems WS (Level 2)
Genetics Problems WS (Level 2)

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FUNDAMENTALS OF GENETICS

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test review - Liberty Union High School District
test review - Liberty Union High School District

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Hardy-Weinberg Activity - Milton

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LECTURE OUTLINE (Chapter 11) I. An Introduction to Mendel and

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File - Lanier High School Media Center

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HS-LS3 Heredity: Inheritance and Variation of Traits

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apbiology_feb27 - Williston School District 29

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Genetics Problems – Set 2 Chris Reyes, & April Quijano

... Probability 4 sons will be hemophiliacs – 1/256 2. Pseudohypertrophic muscular dystrophy is an inherited disorder that causes gradual deterioration of the muscles. It is seen almost exclusively in boys born to apparently normal parents and usually results in death in the early teens. In this disorde ...
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Genetic drift



Genetic drift (or allelic drift) is the change in the frequency of a gene variant (allele) in a population due to random sampling of organisms.The alleles in the offspring are a sample of those in the parents, and chance has a role in determining whether a given individual survives and reproduces. A population's allele frequency is the fraction of the copies of one gene that share a particular form. Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation.When there are few copies of an allele, the effect of genetic drift is larger, and when there are many copies the effect is smaller. In the early twentieth century vigorous debates occurred over the relative importance of natural selection versus neutral processes, including genetic drift. Ronald Fisher, who explained natural selection using Mendelian genetics, held the view that genetic drift plays at the most a minor role in evolution, and this remained the dominant view for several decades. In 1968, Motoo Kimura rekindled the debate with his neutral theory of molecular evolution, which claims that most instances where a genetic change spreads across a population (although not necessarily changes in phenotypes) are caused by genetic drift. There is currently a scientific debate about how much of evolution has been caused by natural selection, and how much by genetic drift.
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