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Classification of Living Things
Classification of Living Things

... Molecular clocks use mutations to estimate evolutionary time. Mutations add up at a constant rate in related species. This rate is the ticking of the molecular ...
Plant Functional Genomics
Plant Functional Genomics

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gene therapy: ethical and social issues

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... Women, therefore, should have more oestrogen and progesterone than androgens in their ovaries. Androgens are related to masculine traits like large muscles and a low-sounding voice. When a woman's body produces more androgens than estrogens, the disturbance in her hormonal balance may lead to a cond ...
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... The most striking observation that emerged from the study of phage production by lysogenic bacteria and of induction of ,J -galactosidase synthesis was the extraordinary degree of analogy between the two systems. Despite the obvious differences between the production of a virus and that of an enzyme ...
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No Slide Title

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Genetics of the bacterial cell
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Biology Standard 2 Test Prep

... Biology Standard 2 (BiologyStandard2) 7. Artificial selection is human intervention allowing only the best organisms to produce offspring. How is this process most useful to humanity? A. It allows the development of new species not dependent on the environment. B. It allows geneticists to emphasize ...
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Chapter 11: Introduction to Genetics
Chapter 11: Introduction to Genetics

... • Mendel studied seven different pea plant traits. • A trait is a specific characteristic, such as seed color or plant height, that varies from one individual to another. • Each of the seven traits Mendel studied had two contrasting characters, for example, green seed color and yellow seed ...
Genetic Engineering
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More on Genetics2013

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PPT - Forest Genetic Resources Training Guide

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< 1 ... 1170 1171 1172 1173 1174 1175 1176 1177 1178 ... 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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